The Authority was constituted under the Post Office Act, 1898 (Act VI of 1898), section 4C(3) read with section 4B, and the Mailing Operator & Courier Service Rules 2013 (মেইলিং অপারেটর ও কুরিয়ার সার্ভিস বিধিমালা, ২০১৩), issued vide Bangladesh Gazette S.R.O. ৩৪৯-আইন/২০১৩ (dated ১১ নভেম্বর ২০১৩) by the Ministry of Posts & Telecommunications.
The Rules replace and supersede the earlier S.R.O. ২৮৮-আইন/২০১১ dated 13 September 2011 (Bidhi 27 of the 2013 Rules); however, any licences, permits, or directives issued under the superseded instrument remain in force until expiry or cancellation.