Trees or bushes of more than fifteen (15) feet in height growing in or upon the portion of any premises abutting any street or sidewalk; shall be deemed to interfere with and obstruct the free passage of pedestrians and vehicles within the meaning of this Subchapter unless the lower limbs, twigs, or leaves of such trees or bushes are kept removed at all times so as to have a clearance of at least nine (9) feet above such street or sidewalk.
('65 Code, § 30-5) (Ord. No. 460 § 2)