ISO/IEC 8825-6:2015:
a) specifies the information needed and the format to be used for specifying PER encoding instructions,

b) specifies the mechanisms for approving new PER encoding instructions from time to time and the operation of the Registration Authority for PER encoding instructions,

c) specifies the means of associating a PER encoding instruction with an ASN.1 type using both type prefixes and an encoding control section.