Most studies of the role of the Australian Council of Trade Unions (ACTU) have argued that the peak-council has traditionally had little if any authority over its affiliates. This paper contends that this situation changed during the 1980s and that the ACTU achieved a significant degree of internal union authority. Examples of such authority are documented and the combination of external factors, such as the political and economic environment, and internal factors, such as leadership and reduced factionalism, that contributed to this growth of authority are analysed.