(a) Each mosquito extermination commission shall, on or before the first day of January in each year, submit to the county commissioners a detailed estimate of the money required for the ensuing year, and a plan of the work to be done, and the methods to be employed. The county commissioners shall have power to approve, modify or alter such estimates, plans and methods, but not to decrease the amount of money estimated to be required therein, without giving to the mosquito extermination commission, in writing, their reason for such action.

(b) The county commissioners shall have power, and it shall be their duty, to appropriate annually, for the use of the commission, the amount of money so approved, modified or altered by them: Provided, That in no year shall the amount, so appropriated, exceed one-fourth of one mill on each dollar of the assessed value of taxable real estate in the county. The sums, so appropriated, or so much thereof as may be required, shall be paid out, from time to time, by the county treasurer on the orders of the county commissioners.

(c) It shall be the duty of each mosquito extermination commission annually, on or before the first day of February of each year, to submit to the Secretary of Agriculture and to the county commissioners of the county, a report setting forth the amount of moneys expended during the previous year, the methods employed, the work accomplished and any other information which in its judgment may be pertinent.