REVENUE DELEGATION AUTHORITY ORDER NO. 4-2021 issued on November 22, 2021 delegates to Assistant Regional Director Eric P. Diesto of Revenue Region (RR) No. 6-Manila the authority to sign documents specified in the Order and to perform other act/s necessary and indispensable in the speedy collection of internal revenue taxes. This is in view of the approved leave of absence of RR 6 Regional Director Jethro M. Sabariaga from November 22, 2021 to January 3, 2022.