Law No. 81 of 1991 —better known as the
Autonomous Municipalities Act of 1991— is the extraconstitutional
Puerto Rican law that regulates the local government of all the
municipalities of Puerto Rico. It was enacted in order to repeal many different and dispersed laws that governed them. Today, the Act serves as a broad and encompassing body of law that covers all the different aspects of a municipality, including its
mayor, the
mayor's office, and the municipal assemblies.