Game and fish wardens may be furnished with necessary skiffs, outboard motors and other equipment necessary in the performance of their duties as such game and fish wardens, said equipment to be furnished by the director and paid out of the conservation fund; provided, that no equipment shall be furnished by the director to wardens appointed for privately owned preserves and refuges; provided further, that the purchase of such equipment shall be made in compliance with the provisions of Chapters 4 and 5 of Title 41.