(a) It shall be unlawful for the owner, agent, or contractor in charge of any construction or demolition site to cause, maintain, permit or allow to be caused, maintained, or permitted the accumulation of any litter on the site before, during or after completion of the construction or demolition project.

(b) The owner, agent, or contractor may be required at any time to show proof of appropriate collection or, if transported by himself or herself, of final disposition of litter at an authorized facility. (Code 1979, § 40-21.7)