SECTION 1. Section two thousand and forty-one of the Administrative Code is hereby amended to read as follows:
"SEC. 2041. Functions of Bureau of Supply.—It shall be the function of the Bureau of Supply to procure and furnish supplies to the various Offices, officials, and branches of the Government and to other persons entitled to make purchases through said Bureau, the same being required for official or other lawful use; and in the absence of special provision, all purchases of supplies for the use of the various Departments, Bureaus, and Offices of the Insular Government or for the use of a chartered city or of any province or municipality shall be made exclusively through this Bureau.
"The Secretary of Commerce and Communications may also, in his discretion, authorized the performance of the same service for the authorities of the United States in the Philippine Islands or for other persons therein."