Concise AACR2: 49. General Rule

49A.Form of heading

Decide the form of name of a corporate body (see rule 23B1) from (in this order of preference):

bibliographic resources issued by the body in its language
reference sources (including books and articles about the body).

If the name contains (or consists of) initials, omit or include full stops according to the predominant usage of the body.

49B.Direct or indirect entry

Enter a corporate body directly under its own name unless rule 54 provides for entering it under the name of a higher or related body or rule 55 provides for entering it under the name of a government.

49C.Changes of a name

If the name of a corporate body has changed, establish a new heading under the new name for works appearing under that name. Refer from the old heading to the new and from the new heading to the old.