During the American occupation, housing policies in Manila dealt with the problem of sanitation and concentration of settlers around business areas. Among those implemented were business codes and sanitation laws in slum areas in the 1930s. During this period and until the 1950s, new communities were opened for relocation. Among these were Projects 1–8 in Diliman, Quezon City and the Vitas tenement houses in Tondo. The government implemented the Public Housing Policy in 1947 that established the People's Homesite and Housing Corporation (PHHC). A few years later, it put up the Slum Clearance Committee which, with the help of the PHHC, relocated thousands of families from Tondo and Quezon City to Sapang Palay in San Jose del Monte, Bulacan in the 1960s.