Every trailer unit shall be provided with a substantial covered garbage can as required for residences in the city. Such garbage can shall be kept on a concrete pavement not less than three feet square and four inches thick, with a smooth troweled top. In every auto trailer camp all such garbage cans shall be collected at one convenient place prior to garbage collection time on each day on which garbage is collected in that district. Immediately after the garbage has been collected, all such cans shall be carefully cleaned and returned to their respective trailer units.
('71 Code, § 1181.21) Penalty, see § 101.99