by the United States government

“ Authority to appoint commissioners; powers of authorities The Legislature of Puerto Rico may provide for the appointment and terms of the commissioners of such authorities, and for the powers of such authorities, except that such authorities shall be given no power of taxation, and may authorize the commissioners of such authorities to fix the salaries of employees. ”

“ Authorization of loans, conveyances, etc., by municipalities The legislature may appropriate funds for and may make and authorize any municipality of Puerto Rico to make loans, donations, and conveyances of money or property to such authorities; may make and authorize any municipality of Puerto Rico to make available its facilities and services to such authorities and take other action in aid of slum clearance or low-rent housing ”