Commission on Audit Circular No. 87-278 dated November 12, 1987 for "Facilitating Audit Action on Infrastructure Projects of Government Departments and Selected Government Corporations"
COA Circular No. 89-299A dated September 8, 1989 on the Lifting of Pre-Audit of Financial Transactions of National Government Agencies and Government-Owned and/or Controlled Corporations
Implementation of COA Circular No. 89-299 dated March 21, 1989 re: Lifting of Pre-Audit of Government Transactions of National Government Agencies and Government-Owned or Controlled Corporations