It shall be the duty of the commissioner of agriculture and commerce, either by himself or his duly authorized agents, to inspect, examine and test any and all equipment used by such livestock sales establishments, and to check the weights of animals sold at such time, and place, and in such manner as he may deem proper and necessary to carry out the intent of this article. The said commissioner shall also issue such permits and collect such fees as are herein provided. All monies collected under this article shall be paid into the general fund in the state treasury.
Provided further, the commissioner is hereby authorized, upon written request, to test the scales, or other weighing devices, of any person in this state desiring such tests, and if the commissioner finds such scales, or other weighing devices to be accurate, within the approved tolerances, he may place his seal of approval thereon. The commissioner shall charge for such services a sum sufficient to defray the expenses thereof, and no part of such cost shall be paid from other funds of said commissioner. A strict accounting of all sums received for such testing and approval shall be made.