Whenever, in the opinion of the city planning commission for the reasons stated below, the commission may approve such exceptions from the requirements and regulations of this title as in its opinion are reasonable, necessary and in conformity with the spirit and purpose of the Subdivision Map Act and of this title, when:
(1) The subdivision is of such size or shape;
(2) Is subject to such title limitations of record;
(3) Is affected by such topographic conditions; or
(4) Is to be devoted to such use that it is physically impossible or impractical.
(Ord. 121 § 110, 1967).