None required, except where a rear lot line adjoins an agricultural or residential zone, in which case a rear yard of not less than 20 feet shall be required, or except where a rear lot line adjoins a dedicated street, in which case a rear yard of not less than the required yards of adjoining properties shall be required. Where the required yards of adjoining properties are different, they shall be averaged to determine the required yard in the PF Zone.
('64 Code, § 48.11) (Am. Ord. 358, passed 7-10-69) Penalty, see § 10.97