The governing body of each city and county for which a sealer has been appointed as provided for by § 3.2-5615 of this chapter shall: (i) procure at the expense of the city or county, as the case may be, such standards of weight and measure and such additional equipment, to be used for the enforcement of the provisions of this chapter in such city or county, as may be prescribed by the Commissioner; (ii) provide a suitable office for the sealer; and (iii) make provisions for the necessary clerical services, supplies, and transportation, and for defraying contingent expenses incident to the official activities of the sealer in carrying out the provisions of this chapter. When the standards of weight and measure required by this section to be provided by a city or county shall have been examined and approved by the Commissioner, they shall be the official standards for such city or county. It shall be the duty of the sealer to make, or to arrange to have made, at least as frequently as once a year, comparison between his field standards and appropriate standards of a higher order belonging to his city or county or to the Commonwealth, in order to maintain such field standards in accurate condition.