The Third Division Telegraphists' and Postal Clerks' Union reregistered as the Union of Postal Clerks and Telegraphists in 1966 with the Fourth Division Postmasters, Postal Workers and Telegraphists' Union merging with it, effective from 19 February 1967. The Third and Fourth Divisions refer to the clerical and lowest-paid divisions of the Commonwealth Public Service respectively. By 1990 the Union had merged into the Australian Postal and Telecommunications' Union.