The Mexican legal system is a mixture of . constitutional theory within a civil law system. Mexico’s legal framework concerning real property includes the Federal Constitution, Federal Civil Code, state civil codes, municipal laws and ordinances. Additionally, the Foreign Investment Law and Foreign Investment Law Regulations regulate foreign investment. In Mexico, real property is classified as either public, private or communal, the nature of which will affect the property’s use and potential alienation. While land in Mexico can be owned in a manner akin to fee-simple in the ., in Mexico, all rights to minerals, oil and gas are held.