(a) After the awarding of the contracts, all work performed under this chapter shall be under the direct supervision and direction of the commission.
(b) The commission shall be responsible for the maintenance of such parks and recreation areas and shall submit approved bills for such maintenance to the county government for payment.
(c) The bills for recreation and recreational promotion including salaries and equipment shall be approved by the commission and submitted to the county government for payment.
(d) The commission may place fences or barriers not less than 4 feet in height between all developed parks and active railroad tracks, the cost of which shall be shared equally between the county and the State.