d land shown on the tentative map or units of airspace shown on the condominium plan. (b) All name plates and signs conform to the provisions of Section 12.21 A.7. (c) The tract sales office is attractively maintained and, where located in a one-family detached structure, is attractively landscaped. (d) The property owner has first executed and filed with the Superintendent of Building a notarized agreement agreeing to comply with all other provisions of this Subdivision and, further, agreeing that after all dwelling units in the development are initially sold or rented, all tract sales being conducted within the structure will cease; all signs will be entirely removed from the premises; any residential type of sliding glass door in a private garage doorway will be replaced with a conventional private garage door, and any sales office activity located in a private garage will be discontinued and this area reconverted for the storage of private vehicles. (Amended by Ord. No. 158,561, Eff. 1/14/84.) 12. (Added by Ord. No. 149,472, Eff. 5/14/77.) Notwithstanding any other provision of this article, equipment and material storage yards used exclusively in connection with public facilities projects may be located in the A, R and C Zones, provided the following conditions are complied with. (a) That such storage activities not be commenced prior to the execution of the construction contract with the governmental entity authorizing such work, and such storage activity be terminated within 30 days of the expiration of the contract or 30 days after completion of the construction, whichever comes first. (b) That no storage or related activities be located closer than 25 feet to any residential improvement unless a solid 8 foot high fence be constructed along the entire property line adjoining such improvement, except at parking of employees’ personal vehicles shall be permitted within the 25 foot buffer area, and such parking area need not comply with the requirements of Section 12.21 A.6. of this article. (c) That the premises and grounds be frequently sprinkled and watered to prevent dust from becoming a nuisance to the neighboring residents. (d) That there be no stockpiling of materials above 8 feet. (e) That hours of operation including servicing and maintenance of all stored equipment be only between 7:00 a.m.