ITU-T H.642.2 PDF

This Recommendation defines registration procedures of the identification scheme defined by [ITU-T H.642.1] for the first level code (1LC) value of 00012. The identification scheme consists of a first level code (1LC), a second level code (2LC), class and elements such as a third level code (3LC), and a fourth level code (4LC). A 2LC is pre-assigned to ITU Member States, and then a 3LC is allocated by the registrant of the 2LC, which is called the second level registration authority (RA). The mechanism is meant for the distributed RA hierarchy.

Therefore, this Recommendation specifies as follows:

- registration procedures for the 2LC and 3LC;

- responsibilities of the second level RA; and 

- procedures for the operation of the second level RA.