stration for a preliminary loan for surveys and planning in respect to such projects, pursuant to Section 15(7)(a)(i) of the United States Housing Act of 1937, as further amended by the Housing Act of 1949, if such loan is deemed necessary by the Housing Authority of the City of Los Angeles. Sec. 3. That the City of Los Angeles shall enter into a Cooperation Agreement with the Housing Authority of the City of Los Angeles in accordance with Section 15(7)(b)(i) of the United States Housing Act of 1937, as further amended by the Housing Act of 1949, in substantially the following form: COOPERATION AGREEMENT BETWEEN THE CITY OF LOS ANGELES AND THE HOUSING AUTHORITY OF THE CITY OF LOS ANGELES, CALIFORNIA 1. The Housing Authority of the City of Los Angeles (hereinafter called the “ Authority ”) agrees to undertake, develop, and administer a low-rent housing project or low-rent housing projects (hereinafter called the “ Projects ”) consisting of approximately 10,000 family dwelling units on sites to be selected by the Authority in the City of Los Angeles (hereinafter called the “City”) and to endeavor during the next three years to secure a contract or contracts with the Public Housing Administration for a Federal loan and for Federal annual contributions to assist in the development and administration of said Projects. 2. The following terms whenever used in this Cooperation Agreement (hereinafter referred to as the “ Agreement ”) shall have the following meaning: (a) The term “ useful life of the Projects ” shall mean the period of physical usefulness of the Projects for the purpose of providing dwelling accommodations, but in no event less than the number of years during which any of the bonds issued to aid in financing the development of the Projects or any bonds issued to refund such bonds shall remain outstanding; (b) The term “ shelter rent” means the charge established (or estimated) by the Authority for the use of a dwelling unit excluding the furnishing of any utilities (i.e. water, heating of water, light, cooking fuel, refrigeration energy, heat or sewer services). 3.