No person shall enter or remain upon any private property open to the public after being notified by the owner or lessee or other person in charge thereof to keep off or remove therefrom, except, that this Section shall not apply in any of the following instances:
A. Where its application results in or is coupled with an act prohibited by the Unruh Civil Rights Act, Cal. Civil Code § 51;
B. Where its application would result in an interference with or inhibition of lawful labor activity;
C. Where a public officer or employee acts within the course and scope of his employment in performance of a duty imposed by law;
D. Where its application would result in an interference with or inhibition of lawful speech and petitioning.
('65 Code, § 23-3) (Ord. No. CS-275 Art. II § 1; Ord. No. CS-895 § 1; Ord. No. CS-991 § 1)