It shall be unlawful for any person, firm or corporation to manufacture, fabricate, assemble, install or repair any system, container, apparatus or appliance to be used for the transportation, storage, dispensation or utilization of liquefied petroleum gas, or to transport, handle or store such gas, unless such person has complied and complies with, all provisions of the state law and local ordinances relating thereto, and has any permit which may be required by state law. No storage of liquefied petroleum gas, except by retail customers, in reasonable amounts, strictly intended for their own use, shall be permitted within the corporate limits of the city.