The tax collector shall keep his office open at the courthouse all the year round. In all counties of the state having a population of 100,000 or less according to the last or any subsequent federal census, the tax collector shall be required between October 1 and January 1 in each year to visit each precinct in the county by himself or by deputy to collect the taxes, and he shall give the same notice of such appointments as is given by the tax assessor. The county commission may by order duly entered on the minutes relieve the tax collector from making the visits to each voting place above provided for when in the judgment of the commission it is deemed advisable and shall by order specify the places in the county which the tax collector shall visit.