This document specifies the requirements for representing authoritative legal entity identifiers (ALEI). These requirements supplement those of ISO 8000 115. The following are within the scope of this document: the requirements for the prefix element, a single sub-domain element and the identifier element to represent authoritative legal entity identifiers. NOTE ALEIs are applicable to all types of legal entity, whether individuals or organizations. The following are outside the scope of this document: the methods used to create a legal entity identifier; the syntax of the query and of the response used in the resolution of the representation of an authoritative legal entity identifier; the methods used for the resolution of the representation of an authoritative legal entity identifier.