Even though Mexican immigration was never subjected to quota limits, U.S. immigration officials used increasingly stringent measures to limit entry. For itinerant laborers who lived in Mexico and worked in the United States, weekly disinfection mandates were regularized, and quarantine and "bath certificates" were required to be renewed weekly. Then, in 1924, the U.S. Congress approved the creation of the Border Patrol, led by the previous chief "Chinese Inspector," Clifford Alan Perkins. The Border Patrol began with headquarters in El Paso overseeing three district offices in Los Angeles, El Paso, and San Antonio. Beginning in the 1920s, visa controls and deportations became regular mechanisms to regulate Mexican immigration. Finally in 1929, Congress passed the "Aliens Act of 1929", known as Blease's Law, which turned undocumented entry into the U.S. a misdemeanor and re-entry a felony. Up to that point, immigration violations were largely considered civil matters.