Any person desiring to do business in connection with the sewers and drains in the Village as a sewer builder or drain layer, shall first obtain a license as such sewer builder or drain layer from the President, and shall pay a fee of ten dollars ($10.00) therefor, which fee shall be paid to the Clerk, who shall account for the same as all other receipts which come into his hands belonging to the sewer fund of the Village, and no person shall receive such license who shall not have attained the age of twenty-one (21) years, and shall not furnish satisfactory evidence of his responsibility and skill to carry on his trade in accordance with the rules and regulations of the Village to the satisfaction of the Engineer or the Board of Trustees.