SIST-V CLC Guide 25:2010
(Main)Guide on the use of standards for the implementation of the EMC Directive to apparatus
- Abstract
No scope available.
- Status
- Published
- Publication Date
- 10-Mar-2010
- Technical Committee
- EMC - Electromagnetic compatibility
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 25-Jan-2010
- Due Date
- 01-Apr-2010
- Completion Date
- 11-Mar-2010
SIST-V CLC Guide 25:2010 is the Slovenian adoption of CENELEC Guide 25:2009, published by SIST. It explains how to use EMC standards to show conformity with the EMC Directive for apparatus, with guidance aimed at manufacturers and at people who choose, apply, or check those standards in practice.
What does SIST-V CLC Guide 25:2010 specify?
SIST-V CLC Guide 25:2010 gives guidance on how harmonised EMC standards listed in the Official Journal of the European Union (OJEU) are used to create a presumption of conformity with the EMC Directive. In practice, it helps a manufacturer decide which standards apply to a product, what parts of EMC are covered, and when more than one standard must be used.
The guide is organized into four main clauses and five informative annexes.
| Annex | What it covers |
|---|---|
| Annex A | Low frequency emission requirements and the state of standardisation |
| Annex B | Definitions and abbreviations |
| Annex C | How references to other standards are handled in EMC standards |
| Annex D | Multifunction equipment |
| Annex E | Annex ZZ templates for EMC standards |
What are the key requirements of SIST-V CLC Guide 25:2010?
SIST-V CLC Guide 25:2010 centers on a few practical rules for selecting and combining EMC standards. The main point is that conformity depends on using the right harmonised standards for the apparatus and for the EMC phenomena that matter.
Clause 1 - how conformity is shown
Clause 1 states that conformity with harmonised standards published in the OJEU gives presumption of conformity only within the scope of those standards and only for the protection requirements they cover. If a manufacturer uses a standard only partly, the technical documentation must include an electromagnetic compatibility assessment for the aspects not covered.
Clause 1 also explains that if no suitable product-family or dedicated product standard is available in the OJEU, generic standards are used instead. For a reader, this means the compliance route is not always one product standard - sometimes it is a combination of standards matched to the product and its EMC environment.
Clause 2 and Table 1 - matching equipment to standards
Clause 2 provides a non-exhaustive Table 1 that links typical equipment families with the standards used for emission and immunity. The guide says that all standards on the same horizontal line for a product category must be applied to claim presumption of conformity.
This matters because EMC compliance is often split across several documents. For example, one standard may cover harmonics, another radio-interference emission, and another immunity. The table is only indicative, and the definitive list is the OJEU list.
Clause 3 - selecting the right standard
Clause 3 gives six principles for choosing standards. The scope of the standard governs its use, but the intended use and function of the equipment also matter. That is why a product with extra electronics is not automatically treated as a different product family if its basic function is unchanged.
Clause 3 also notes that interface modules can need additional port-specific requirements, and that the scopes of EN 55011, EN 55013, EN 55014, EN 55015 and EN 55022 are generally mutually exclusive for single-function equipment. In practice, that means the choice of emission standard is usually one main choice, not several overlapping ones.
Clause 3 further says that multifunction apparatus may need more than one standard, and it points to Annex D for how to test such equipment. It also explains that EN 61000-3-2 and EN 61000-3-3 are product-family standards that apply in their own right to products within their scope, while basic standards are used for methods and do not by themselves give a declaration of conformity.
Clause 4 and Annex C - use of lists and references
Clause 4 explains how to read the OJEU lists when standards are updated. It covers the relationship between superseded and newly listed standards, the date when presumption of conformity stops for the old version, and the cases where a new edition has a narrower or broader scope.
Annex C gives the reference rules used in EMC standards. In practice, this tells the reader which referenced edition must be applied when a standard points to another standard, especially when a harmonised standard refers to another harmonised standard or when an EN is based on an international standard.
Annex A and Annex D - special cases
Annex A distinguishes between equipment up to 16 A, equipment between 16 A and 75 A, equipment above 75 A, and equipment for medium-voltage or high-voltage public supply. For low-frequency emissions, this matters because the route to compliance changes with current rating and with the type of supply connection.
Annex D explains how to test multifunction equipment. If functions can operate together in normal use, they should be tested together. If the same phenomenon or test is covered by more than one standard, the most stringent limit applies, and the test need only be done once if all relevant operations remain functional.
What terms does SIST-V CLC Guide 25:2010 define?
- Harmonisation (of national standards) - the reduction or removal of technical differences between standards with the same scope so products can circulate more easily.
- Harmonised standard - a European standard published in the OJEU that supports presumption of conformity with the EMC Directive.
- European Standard (EN) - a standard adopted by CEN/CENELEC that must be implemented as an identical national standard and conflicting national standards withdrawn.
- National deviation - a change, addition, or deletion made in a national standard within the same scope as an EN.
- A-deviation - a national deviation caused by regulations outside the competence of the national CEN/CENELEC member.
- Date of withdrawal (dow) - the latest date by which conflicting national standards must be withdrawn.
- Technical Report - an informative CEN/CENELEC document that is not suitable to be published as an EN or a Technical Specification.
Who uses SIST-V CLC Guide 25:2010?
SIST-V CLC Guide 25:2010 is used by manufacturers, test laboratories, conformity assessors, supply authorities, installers, and product committees. It helps them choose the right EMC standards, decide whether one standard is enough or several must be combined, and understand how OJEU listings affect compliance.
The guide is especially relevant for sectors named in Table 1, including household appliances, lighting equipment, TV and audio equipment, IT equipment, industrial equipment, meters, alarm systems, UPS, welding equipment, adjustable speed drives, measurement and laboratory equipment, radio-communication equipment, and telecommunication network equipment.
What changed in SIST-V CLC Guide 25:2010 from the previous edition?
This third edition supersedes CENELEC Guide 25:2005. The foreword and introduction state that it updates the guidance in light of Directive 2004/108/EC and updates the references to standards.
Which standards are used with SIST-V CLC Guide 25:2010?
| Standard or group | What it contributes |
|---|---|
| EN 61000-3-2, EN 61000-3-3, EN 61000-3-11, EN 61000-3-12 | Low-frequency emission limits for harmonics, voltage fluctuations, and flicker |
| EN 55011, EN 55013, EN 55014-1, EN 55015, EN 55022 | Radio-interference emission standards for different product families |
| EN 55014-2, EN 55020, EN 55024, EN 61547, EN 61000-6-2, EN 61000-6-3, EN 50130-4 | Immunity and generic EMC standards used with the product-family approach |
| EN 55103-1, EN 55103-2 | EMC for professional audio, video, and entertainment lighting control equipment |
| EN 61326-1 and specific parts as appropriate | EMC for measurement, control, and laboratory equipment |
| ETSI relevant standards | EMC-related standards for radio-communication equipment and telecommunication network equipment |
Table 1 also names other companion parts such as EN 60730-1 with EN 60730-2 to EN 60730-x, EN 60947-1 with EN 60947-2 to EN 60947-x, EN 50065-2-1, EN 50065-2-2, EN 50065-2-3, EN 62040-2, EN 60974-10, EN 61800-3, EN 61131-2, EN 61543, EN 60945, EN 61036, EN 60687, EN 61037, and EN 61038.
What does the SIST-V CLC Guide 25:2010 document contain?
The document contains general principles for EMC conformity, an indicative table linking product families to standards, and practical criteria for selecting standards when scopes overlap or when equipment has multiple functions. It also contains explanatory annexes on low-frequency emission requirements, definitions and abbreviations, how references to other standards are handled, and how multifunction equipment should be tested.
Annex E provides template Annex ZZ texts for standards that cover emission only, immunity only, or both. These texts are used by product committees when preparing harmonised standards so the EMC coverage is stated in the format expected for EU new approach directives.
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SIST-V CLC Guide 25:2010 is a guide published by the Slovenian Institute for Standardization (SIST). Its full title is "Guide on the use of standards for the implementation of the EMC Directive to apparatus". This standard covers: No scope available.
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SIST-V CLC Guide 25:2010 is classified under the following ICS (International Classification for Standards) categories: 01.120 - Standardization. General rules; 33.100.01 - Electromagnetic compatibility in general. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST-V CLC Guide 25:2010 has the following relationships with other standards: It is inter standard links to SIST-V CLC Guide 34:2024. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
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Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2010
Vodilo za uporabo standardov pri implementaciji direktive EMC za naprave
Guide on the use of standards for the implementation of the EMC Directive to apparatus
Ta slovenski standard je istoveten z: CLC Guide 25:2009
ICS:
01.120 Standardizacija. Splošna Standardization. General
pravila rules
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
CENELEC Guide 25
Guide on the use of standards
for the implementation
of the EMC Directive to apparatus
This third edition of CENELEC Guide 25, prepared by CENELEC Technical Committee TC 210,
Electromagnetic Compatibility (EMC), was approved by the CENELEC Technical Board by
correspondence on 2009-07-01.
Edition 3 / December 2009
Avenue Marnix, 17
B - 1000 Brussels
Tel.: + 32 2 519 68 71
Fax: + 32 2 519 69 19
www.cenelec.eu
Guide on the use of standards for the implementation CENELEC Guide 25
of the EMC directive to apparatus
Foreword
This CENELEC Guide has been prepared by CENELEC Technical Committee TC 210, EMC.
This third edition was approved by the CENELEC Technical Board on 2009-07-01; it
supersedes CENELEC Guide 25:2005.
CENELEC members are the national electrotechnical committees of Austria, Belgium,
Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands,
Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the
United Kingdom.
Edition 3 / December 2009 3
CENELEC Guide 25 Guide on the use of standards for the implementation
of the EMC directive to apparatus
CONTENTS
1 General principles . 6
2 Application to typical equipment . 6
3 Criteria for selecting standards . 7
4 General remarks on the list of EMC harmonised standards . 11
Annex A Low frequency emission requirements State of the standardisation (explanatory) . 13
Annex B Definitions and abbreviations . 15
Annex C Additional information on references to other standards in EMC standards . 17
Annex D Multifunction equipment . 19
Annex E Annexes ZZ . 20
4 Edition 3 / December 2009
Guide on the use of standards for the implementation CENELEC Guide 25
of the EMC directive to apparatus
INTRODUCTION
The EMC Directive, 2004/108/EC states that a presumption of conformity with the protection
requirements (emission and immunity) related to EMC shall exist for all apparatus in
conformity with those harmonised standards (ENs) that are identified as relevant by
publication of their reference numbers in the Official Journal of the European Union (OJEU).
The presumption of conformity is limited to the scope of the harmonised standard(s) applied
and the relevant protection requirements covered by the harmonised standard(s).
This third edition of Guide 25 updates the guidance in the light of the application of Directive
2004/108/EC, and updates the references to the standards.
Edition 3 / December 2009 5
CENELEC Guide 25 Guide on the use of standards for the implementation
of the EMC directive to apparatus
1 General principles
Conformity with the harmonised standards listed in the Official Journal (OJEU) of the
European Union (generic and product standards i.e. product-family or dedicated product
standards) provides a presumption of conformity with the protection requirements of EMC
Directive 2004/108/EC (covering emission and immunity). Harmonised standards are thus
designed to satisfy the protection requirements of the EMC Directive.
The complete list of harmonised standards published in OJEU under the EMC-directive may
be found on the following website of the European Commission:
http://ec.europa.eu/enterprise/electr_equipment/emc/stand.htm
Standards may be used to demonstrate compliance with all the protection requirements (this
means, if applicable, low-frequency as well as high-frequency phenomena, emission as well
as immunity) or may be used to cover them only in part. Where harmonised standards are
not applied, or are not applied in full, the technical documentation required by Annex II of the
Directive must include an electromagnetic compatibility assessment of the apparatus, on the
basis of the relevant phenomena, for those aspects not covered by the parts of the
harmonised standards applied (if any).
The simplest route to compliance is for a manufacturer to use standards that cover the whole
of the EMC protection requirements of the Directive, in which case the manufacturer has to
apply all the normative EMC requirements of those standards listed in the OJEU whose
scopes are applicable to the individual product.
In the absence of appropriate product standards i.e. product-family or dedicated product
standards in the OJEU list, the generic standards shall be applied to show compliance.
When showing compliance through standards it is often necessary to comply with more than
one standard. This is because some EMC standards do not cover the whole EMC domain
covered by the EMC Directive. They may concern only immunity (e.g. EN 61547) high-
frequency emission (e.g. EN 55014-1, EN 55011, EN 55015, etc.) or low frequency emission
phenomena (e.g. EN 61000-3-2, EN 61000-3-3).
When dedicated product standards are listed either for emission or immunity, the directly
corresponding product family standards do not normally apply as well, except when referred
to in the dedicated standards.
2 Application to typical equipment
With a view to helping manufacturers, the following non-exhaustive Table 1 shows, for some
examples of typical equipment, those standards to apply to cover the protection requirements
of the EMC Directive. All the standards on the horizontal line, corresponding to a category of
equipment, must be applied to demonstrate presumption of conformity by application of
harmonised standards.
6 Edition 3 / December 2009
Guide on the use of standards for the implementation CENELEC Guide 25
of the EMC directive to apparatus
This table reflects only the situation at the date of publication of this CENELEC Guide. It will
be updated in subsequent editions of the Guide.
Note that this table is indicative only. The definitive list of standards that are applicable under
the EMC Directive is published in the Official Journal of the European Union. The reference
to the Commission website where the latest list may be viewed or downloaded as a .pdf file
is given in Clause 1 of this Guide. Note that the .pdf file of the relevant OJEU pages is
definitive, and the list on the web page is provided for information only, and has no legal
validity.
3 Criteria for selecting standards
Selecting a particular product standard for application to a given product may sometimes
give difficulties.
The following series of six basic principles will help in the selection of appropriate standards:
1) The scopes of the product-family or dedicated product standards govern their
applicability to individual products. The scopes of the standards should therefore be
considered carefully, with all their implications. In case of doubt (which may still arise
with very broad scope definitions in product-family standards) a second principle (see
item 2 following) may be useful.
2) It is the intended use and function of the equipment that determines the EMC standards
to be applied.
EXAMPLE:
A washing machine, whatever communication or microprocessor modules are used in it,
remains basically classified as household equipment for the application of standards and
therefore EN 55014-1 and EN 55014-2 apply.
3) Particular interface modules in well-defined equipment (e.g. washing machines) may
have to comply with additional requirements that are not included in the normally
applicable product-family standard for the complete product. In this case, the interface
module (separated or not from the complete apparatus) shall comply with additional
requirements for the port corresponding to the interface module only.
NOTE It may be advisable to include at a later stage requirements for connection ports to public and/or
private telecommunication lines in both generic and product (family) standards. This would make the
problem easier by avoiding the need to resort to additional standards.
4) The scopes of EN 55011, EN 55013, EN 55014, EN 55015 and EN 55022, for radio-
interference emission limitation, are in general mutually exclusive. This means that only
one of them has to be selected for given single function equipment to comply with the
protection requirements of the EMC Directive.
Edition 3 / December 2009 7
CENELEC Guide 25 Guide on the use of standards for the implementation
of the EMC directive to apparatus
5) Despite these general principles, borderline problems may still occur that are difficult to
solve. For multifunction apparatus, it may be necessary to comply with more than one
standard for emission and/or immunity. See Annex D for further information.
6) EN 61000-3-2 and EN 61000-3-3 are published in the OJEU as product family
standards, and apply in their own right to all products in the scope of these standards.
It is intended that generic and product (- family) standards should make reference to the
basic standards without repeating their detailed contents. Basic standards do not contain
requirements and therefore a declaration of conformity of products with the basic standards
has no significance. Thus basic standards are not included in the list of harmonised
standards published in the Official Journal of the European Union (OJEU). This OJEU list will
indeed include only those standards permitting the direct presumption of conformity of
products with Directive 2004/108/EC.
Alternative test and measurement methods, when introduced into a harmonised standard for
the same purpose are considered, together with their associated limits, as equivalent
regarding the provision of a presumption of conformity with the protection requirements.
8 Edition 3 / December 2009
Guide on the use of standards for the implementation CENELEC Guide 25
of the EMC directive to apparatus
Table 1
(Non-exhaustive table)
Families of products Standards covering the protection EMC requirements
Emission Immunity
Harmonics Voltage Radio- (All aspects)
(see Note 1) fluctuations interference
(see Note 1)
Household appliances and EN 61000-3-2 or EN 61000-3-3 or EN 55014-1 (2) EN 55014-2
portable tools (motor-driven EN 61000-3-12 EN 61000-3-11
such as vacuum cleaners,
washing machines etc; heating
and cooking appliances, etc.)
Lighting equipment EN 61000-3-2 or EN 61000-3-3 or EN 55015 (8) EN 61547
EN 61000-3-12 EN 61000-3-11
TV receivers and audio EN 61000-3-2 or EN 61000-3-3 or EN 55013 EN 55020
equipment EN 61000-3-12 EN 61000-3-11
Professional audio, video and EN 55103-1 EN 55103-1 EN 55103-1 EN 55103-2
entertainment lighting control (refers to (refers to
equipment EN 61000-3-2) EN 61000-3-3)
Information Technology (IT) EN 61000-3-2 or EN 61000-3-3 or EN 55022 EN 55024
equipment EN 61000-3-12 EN 61000-3-11
Mains signalling equipment (7) - - EN 50065-1 EN 50065-2-1
EN 50065-2-2
EN 50065-2-3
ISM equipment EN 61000-3-2 or EN 61000-3-3 or EN 55011 EN 61000-6-2
EN 61000-3-12 EN 61000-3-11
Industrial equipment in general - (3) - (3) EN 61000-6-4 EN 61000-6-2
Static watt-hour meters - - EN 61036 EN 61036
(Classes 1 and 2)
Static watt-hour meters - - EN 60687 EN 60687
(Classes 0,2 S and 0,5 S)
Electronic ripple control - - EN 61037 EN 61037
receivers
Time switches for tariff and - - EN 61038 EN 61038
load control
Marine navigational equipment - - EN 60945 EN 60945
Automatic electrical controls for EN 61000-3-2 or EN 61000-3-3 or EN 60730-1 and EN 60730-1 and
household and similar use (6) EN 61000-3-12 EN 61000-3-11 -x (4) –x (4)
Household electronic switches EN 60669-2-1 EN 60669-2-1 EN 60669-2-1 EN 60669-2-1
for fixed installations (6) (refers to (refers to
EN 61000-3-2) EN 61000-3-3)
Induction watt-hour meters - - - EN 60521
Programmable controllers - - EN 61000-6-4 EN 61131-2
(industry)
Low-voltage switchgear and - - EN 60947-1 and- EN 60947-1
controlgear (6) x (5) and-x (5)
Alarm systems EN 61000-3-2 or EN 61000-3-3 or EN 61000-6-3 EN 50130-4
EN 61000-3-12 EN 61000-3-11
Edition 3 / December 2009 9
CENELEC Guide 25 Guide on the use of standards for the implementation
of the EMC directive to apparatus
Families of products Standards covering the protection EMC requirements
Emission Immunity
Harmonics Voltage Radio- (All aspects)
(see Note 1) fluctuations interference
(see Note 1)
Uninterruptible power systems EN 62040-2 EN 62040-2 EN 62040-2 or EN 62040-2 or
(UPS) EN 50091-2 (9) EN 50091-2 (9)
Arc welding equipment EN 60974-10 EN 60974-10 EN 60974-10 EN 60974-10
Residual current operated - - EN 61543 EN 61543
protective devices for
household use
Adjustable speed power drives EN 61800-3 EN 61800-3 EN 61800-3 EN 61800-3
(refers. to (refers to
EN 61000-3-2) EN 61000-3-3)
(3) (3)
Equipment for measurement, EN 61326-1 and EN 61326-1 and EN 61326-1 and EN 61326-1 and
control and laboratory use specific parts as specific parts as specific parts as specific parts as
appropriate appropriate appropriate appropriate
Radio-communication EN 61000-3-2 or EN 61000-3-3 or See ETSI See ETSI
equipment and EN 61000-3-12 EN 61000-3-11 relevant relevant
telecommunication network standards standards
equipment
NOTES to Table 1:
General note:
A dash (-) indicated in Columns 2 to 4 means either that the relevant family of products is, with our present
knowledge, not concerned with the phenomenon, or that the standards do not presently include any requirements.
It does not preclude that equipment should be designed to meet the normal EMC environment including EMC
compatibility levels on the supply system.
Particular notes:
(1) Only for equipment intended for connection to LV public supply.
(2) For microwave ovens and other appliances for domestic use designed to use or radiate radio-frequency
energy, EN 55011 applies instead of EN 55014-1.
(2) Only for equipment intended for connection to LV public supply.
(3) No limits in standards for equipment connected to private LV networks but installation restrictions by supply
authorities may apply (see Annex A).
(4) Relevant dedicated product standards (particular parts) published in the OJEU (series EN 60730-2 to
EN 60730-x) apply together with the general part (EN 60730-1).
(5) Relevant dedicated product standards (particular parts) published in the OJEU (series EN 60947-2 to
EN 60947-x apply together with the general part (EN 60947-1).
(6) The EMC Directive applies insofar as these products are apparatus or components within the scope of the
EMC Directive.
(7) For residential, commercial and light industrial environments, EN 50065-2-1 may be used. For industrial
environments, EN 50065-2-2 may be used. For equipment used by electricity suppliers and distributors,
EN 50065-2-3 may be used.
(8) Requirements for lighting apparatus in the ISM frequency bands 2,45 GHz and 5,8 GHz are contained in
EN 55011. Requirements for all other lighting apparatus are contained in EN 55015.
(9) EN 50091-2 ceased to give a presumption of conformity on 1 October 2008.
10 Edition 3 / December 2009
Guide on the use of standards for the implementation CENELEC Guide 25
of the EMC directive to apparatus
4 General remarks on the list of EMC harmonised standards
The following remarks are intended to facilitate the use of the lists of harmonised standards
published in OJEU.
a) For product standards, for example, EN 60669, EN 60730, EN 60945, EN 61036,
EN 61037 and EN 61038, which include requirements other than EMC, only the EMC
clauses for emission and immunity apply within the framework of the EMC Directive.
b) When new editions or revised (amended) standards are published in the OJEU, the
consolidated list of published standards indicates the date of cessation of presumption of
conformity doc (with the EMC Directive) of the superseded standards. This date is, in
most cases, the same as the date of withdrawal of the superseded standard dow
indicated by the standardisation body in the revised standard, but it may be different in
exceptional cases.
c) Products placed on the market in the European Economic Area (EEA) between the date
of listing of the new standards in the OJEU and the date of cessation of presumption of
conformity of the standard being superseded, may comply with either the superseded
standard or the newly listed standard.
d) From the date of cessation of conformity of the superseded standard, all products placed
on the market (including continuous manufacture of individual product types first placed
on the market before this date) shall comply with the requirements of the newly listed
standard.
e) If the newly listed standard has a narrower scope than the superseded standard:
From the date of cessation of conformity, products within the scope of the newly listed
standard shall comply with that standard. The “superseded” standard is only partly
superseded in the sense that it remains valid for products within its scope but outside the
scope of the newly listed standard.
f) If the newly listed standard has a broader scope than the superseded standard:
From the date of cessation of conformity, products within the scope of the newly listed
standard shall comply with that standard.
g) If the newly listed standard has a scope which encompasses products previously not
covered by a product or product family standard:
Up to the date of cessation of conformity, products may comply with the relevant generic
standard(s). From the date of cessation of conformity, all products within the scope of
the newly listed standard shall comply with that standard.
h) These principles (a-g) are also valid for amendments.
Edition 3 / December 2009 11
CENELEC Guide 25 Guide on the use of standards for the implementation
of the EMC directive to apparatus
i) In some cases, it may be necessary to apply a product standard containing general rules
(general part of a series of standards or sub-standards) in conjunction with a more
dedicated particular part (often identified by the same number plus a different suffix
number from 2 to x).
When the standard or part containing the general rules is not sufficient to give
presumption of conformity with the protection requirements, this particular case is
indicated in the OJEU list by a specific note (in addition a dash – is placed in the
columns corresponding to the superseded standard and to the date of cessation of
conformity of the superseded standard)
The same principle and note are applied when a standard without its amendment is not
sufficient to give presumption of conformity.
j) References to other sta
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