Authority for the Head and the Assistant Head of CAAC to Exercise Administrative and Substantive Authorities. Category: Department OrderSub Category: areas-responsibilities-authority-designationSeries: 1987No: 22File: DO_022-A_S1987.pdfDate: Tuesday, July 14, 1987Tags: Authority Head CAAC Exercise Administrative areas 022-A Read more about Authority for the Head and the Assistant Head of CAAC to Exercise Administrative and Substantive Authorities.