This Recommendation added a new NOTE to the first paragraph as follows: NOTE–This Recommendation | International Standard is based on ISO/IEC 10646:2003. It cannot be applied using later versions of this standard.
ITU-T X.691 CORR 1-2011 history
2015ITU-T X.691-2015 Information technology �C ASN.1 encoding rules: Specification of Packed Encoding Rules (PER) (Study Group 17)
2011ITU-T X.691 CORR 1-2011 Information technology ASN.1 encoding rules: Specification of Packed Encoding Rules (PER) Technical Corrigendum 1 Study Group 17
ITU-T X.691 CORR 1-2011 Information technology ASN.1 encoding rules: Specification of Packed Encoding Rules (PER) Technical Corrigendum 1 Study Group 17 was changed to ITU-T X.691-2015 Information technology �C ASN.1 encoding rules: Specification of Packed Encoding Rules (PER) (Study Group 17).