Subject to the limitation provided in subsection (ii) hereinbelow, that portion of a vehicular driveway encroaching in any public right-of-way for street purposes or on any public right-of-way offered for dedication for equestrian travel purposes or in any right-of-way being used for such purposes, in any Agricultural Residential Zone (A-1) in the City of Norco as of the effective date of City's Ordinance No. 294, (June 3, 1974) and which portion was improved with a surface material, consisting of concrete, asphalt or comparable impervious material, may continue with such surfacing material for twenty (20) years to June 3, 1994, after which date said surfacing shall be removed.
Thereafter, however, the installation and use of the following approved materials in the intersection of driveways and the Pedestrian-Equestrian way is required:
(i)
Decomposed granite, slag or steel slag with a more or less equal gradation mixture between 1/2 inch size maximum and No. 200 sieve size minimum.
(ii)
Other materials, if City Council finds, based on a Streets and Trails Commission recommendation, that the proposed material will not constitute a threat to the public health, safety, and general welfare.
(iii)
The provisions of subsection (e) shall apply only to a vehicular driveway, as of said effective date of Ordinance 294 (June 3, 1974), if said driveway had been excavated, constructed and improved pursuant to a properly and legally issued permit by the City and if, said driveway complied with all the conditions imposed therein by said permit and with all applicable laws of the State of California and the City of Norco, including its ordinances and resolutions.