(a) The county commission of each county and the mayor or other governing body of any city may appoint for their respective county or city one or more sealers of weights and measures; provided, however, that two or more counties may appoint jointly for their counties a sealer, subject to the approval of the Commissioner of Agriculture and Industries; provided further, that any county and any city within the county may jointly appoint a sealer of weights and measures, subject to the approval of the commissioner.
(b) No person shall be appointed as local sealer of weights and measures until he has received a certificate from the Commissioner of Agriculture and Industries showing that such person had the qualifications required by the State Board of Agriculture and Industries.
(c) All such counties or cities appointing a sealer of weights and measures shall keep at all times, at the expense of the county or city, or both, such standards and apparatus of such material and construction as the Commissioner of Agriculture and Industries may direct. All such standards and apparatus, having been tried and accurately proven, shall be sealed and certified to by the commissioner as provided for in this chapter, and shall be then preserved by the county or city sealer as public standards for such county or city.