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3. When there are not more than two (2) Group R, Division 3 or Group U Occupancies, the requirements of this section may be modified, provided, in the opinion of the chief, firefighting or rescue operations would not be impaired. (b) Extent. The access roadway shall be extended to within one hundred fifty (150) feet of all portions of the exterior walls of the first story of any building. Where the access roadway cannot be provided, approved fire protection system or systems shall be provided as required and approved by the fire marshal. (c) Fire protection alternate. Where fire protection systems approved by the fire marshal are provided, the above required clearance may be modified. (d) Oversizing. The fire marshal shall have the authority to require an increase in the minimum access width where such width is not adequate for fire or rescue operations. (b) Subsection 503.7 is added to the California Fire Code to read as follows: 503.7 Planned Unit Development Access. (a) Road widths. Access roadways or streets in a PUD shall comply with the provisions of Santa Ana Municipal Code Sections 14-24 and 14-25 as well as the road widths as follows: 20 feet wide when parking is not allowed on either side of the roadway. 30 feet wide when parking is not allowed on only one side of the roadway and, 40 feet wide when parking is not restricted. Exceptions: The Fire Marshal is authorized to modify the provisions of this section when all buildings are completely protected with an approved sprinkler system. (b) Dead Ends. Dead end fire department access roads shall be in accordance with Santa Ana Municipal Code Section 14-25. (c) Cul-de-sacs. Cul-de-sacs shall be maintained clear and unobstructed as required by Santa Ana Municipal Code Section 14-25. (c) Subsections 503.2, 503.2.1, 503.2.2, 503.2.3, 503.2.4 of the California Fire Code are deleted. (d) Subsection 503.4 of the California Fire Code is amended to read as follows: Ordinance No. NS-2760 Page 27 of 36