The text of the Articles and Entries referred here are as follows:
Article 70 (4), Federal Legislative List, Fourth Schedule, Part-I, Entry-7:
7. Posts and telegraphs, including telephones, wireless broadcasting and other like forms of communications, Post Office Saving Bank.
Article 99 (3) of the Constitution of 1973:
99. Conduct of business of Federal Government.
(3) The Federal Government shall also make rules for the allocation and transaction of its business.