Each of such examining boards of plumbers shall have power to procure suitable quarters for the transaction of business, to provide the necessary books and stationery and to employ a clerk to keep such books and record the transactions of such board. The board of estimate and apportionment or the common council of a city as the case may be shall annually insert in their tax levy a sufficient sum to meet all the expenditures incurred under the provisions of this article.

The expenses incurred by the several examining boards of plumbers in the execution and performance of the duties imposed by this article shall be a charge on the respective cities and shall be audited, levied, collected and paid in the same manner as other city charges are audited, levied, collected and paid.