Urban property protection and reinsurance act of 1968 as amended, Riot insurance and fair plans and crime insurance, enacted by Housing and urban development act of 1968, Public law 90-448, approved Aug. 1, 1968, and Housing and urban development act of 1969, Public law 91-152. approved Dec. 24, 1969, and Housing and urban development act of 1970, Public law 91-609, approved Dec. 31, 1970.