The text
(a)
For the purpose of restricting parking in front of doorways and entrances of buildings where people congregate, or where unusual loading or unloading of merchandise exists, the city engineer shall have authority to determine the location of loading zones and the times during which such zones shall be so used and shall cause to be erected and maintained appropriate signs indicating the same.
(b)
It shall be unlawful for the operator to park a vehicle in any place marked as a loading zone during the period designated for its use as such.
(Code 1971, § 22-175)