In enacting this part, the Legislature hereby finds and declares that there is a need for farm labor centers for the assembling, domiciling, and housing of persons and families engaged in agricultural work to help assure the agricultural communities of a supply of such workers as and when they are needed; that the operation of farm labor centers is a proper function for housing authorities established pursuant to the Housing Authorities Law (Chapter 1 (commencing with Section 34200), Part 2, Division 24); and that the necessity in the public interest for the provisions herein enacted is hereby declared as a matter of legislative determination and of statewide application. It is further declared by the Legislature that its intent in enacting this part is to remedy the conditions described in this section by providing for the furnishing of the farm labor centers authorized herein to single persons and families whose principal source of income is agricultural work, without regard to whether such persons and families have low incomes.