46 Pa. Stat. § 123
All stationery and other supplies required for the use of the departments, and the senate and house of representatives, shall be in charge of the librarian of the senate, whose duty it shall be to receive the same from the contractors, upon requisition made by him; and he shall from time to time deliver such stationery and other supplies, upon the written orders of the heads of the several departments and the chief clerks of the two houses, taking their receipt for the same; it shall be his further duty to see that the contracts are faithfully complied with, and he shall make report thereof to the auditor general before the final settlement of the accounts of the contractors; and he shall give a bond to the commonwealth, in the sum of five thousand dollars, with two sufficient sureties to be approved by the auditor general or governor, conditioned for the faithful performance of his duties, and the safe-keeping and delivery of all stationery and other supplies received from the contractors; and it shall be the duty of the auditor general to withhold from every such contractor the warrant for one-fourth part of his contract, until he receives the report of the librarian of the senate as aforesaid; the board of commissioners of the public buildings and grounds shall provide a room for the storing of the stationery and supplies, to be in charge of the librarian of the senate.
46 P.S. § 123