A landlord shall not cause or knowingly permit:
(a) Any premises under his or her control to be used or maintained for any illegal drug activity, gang-related crime, or in such manner as to constitute a drug-related nuisance; or
(b) Any tenant to use or occupy premises under the landlord's control, if the tenant commits, permits, maintains or is involved in any illegal drug activity, gang-related crime, or drug-related nuisance on the premises.
(Ord. 530 § 1 (part), 1999).