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# <li value="3">The file does not contain duplicates. Participating libraries must ensure that an authority record does not already exist before creating a new one. Consequently, participating libraries must update an existing authority record rather than create a new one when they wish to include additional information about the entity represented by the record (for example, a birth date).</li>
 
# <li value="3">The file does not contain duplicates. Participating libraries must ensure that an authority record does not already exist before creating a new one. Consequently, participating libraries must update an existing authority record rather than create a new one when they wish to include additional information about the entity represented by the record (for example, a birth date).</li>
# When an authority contains coding which indicates that it is not RDA compliant (008/10 (Descriptive cataloging rules) containing a value other than z and no 040 $e "rda") is revised, the access points it contains must be revised ,if necessary, to comply with RDA and the coding in fields 008 and 040 modified accordingly.
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# When an authority contains coding which indicates that it is not RDA compliant (008/10 (Descriptive cataloging rules) containing a value other than z and no 040 $e "rda") is revised, the access points it contains must be revised, if necessary, to comply with RDA and the coding in fields 008 and 040 modified accordingly.
 
# The authorities must be formulated in MARC21 according to RDA and follow the options indicated in the LC-PCC PS, the LAC-BAnQ policy statements and other policies established by the Standards Committee.
 
# The authorities must be formulated in MARC21 according to RDA and follow the options indicated in the LC-PCC PS, the LAC-BAnQ policy statements and other policies established by the Standards Committee.
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<li>the cross-references leading to the authorized access point from variant access points (MARC field 4XX) or from related access points (MARC field 5XX) if appropriate.
 
<li>the cross-references leading to the authorized access point from variant access points (MARC field 4XX) or from related access points (MARC field 5XX) if appropriate.
 
<li>control data and the content designation for proper identification and manipulation of the data.</li> </ol>
 
<li>control data and the content designation for proper identification and manipulation of the data.</li> </ol>
</li>
      
<p style="margin-left: 3em;">An authority record may contain :</p>
 
<p style="margin-left: 3em;">An authority record may contain :</p>
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