Sec. 20-18. Governmental vehicles exempt from truck route and loading or unloading provisions.
The provisions of sections 20-15 through 20-17 shall not be construed to prohibit the use of any street, alley or area of the city by vehicles of the United States Government, this state, county or city while in performance of their official or normal duties.
(1953 Code, ch. 17, ยง 22)