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.