The works, or parts of works, which shall be built, and the goods to be acquired in the United States, or in a foreign country for transportation to Puerto Rico, and all others hereinafter specified, are hereby exempted from contracting through public bidding and may be made the object of private contract; Provided, That the said private contracts shall be approved by the Secretary of Transportation and Public Works. History —Political Code, 1902, § 422.
Puerto Rico Legal Code