It is unlawful to willfully remove, destroy, mutilate, or deface any structure, monument, statue, fountain, wall, fence railing, vehicle, bench, sign, shrub, tree, lawn or grass, plant, flower, lighting system or sprinkling system or other property lawfully in any park. Provided, however, that maintenance activities in any park may be authorized with the prior written consent of the Director. No foreign matter, such as sawdust or sand, gravel or soil conditioner may be added to any field or park in order to use the property in wet weather without the prior written consent of the Director. (Ord. M-1072 § 5, 1969; Ord. M-3996 § 4, 12/05/2011))