No person owning or having charge, care, custody, or control of any dog shall cause or allow, either wilfully or through failure to exercise due care or control, any such dog to be upon any private property unless such dog be restrained thereon by a fence, wall, substantial chain, leash not exceeding six feet in length, other appropriate physical restraint, or is under the charge of a person competent to exercise care, custody, and control over such dog. No person owning or having charge, care, custody, or control of any dog shall cause or allow, either wilfully or through failure to exercise due care or control, any such dog to be upon any highway, street, alley or any other public property unless such dog be restrained by a substantial chain, or leash not exceeding six feet in length, and is under the charge of a person competent to exercise care, custody and control over such dog, unless the owner or operator of such public property grants written permission for such dog to be on such property without such chain or leash.
(Ord. 918 § 1, 1978; Ord. 1158 § 15, 1988)