Section 6. The employes of the Department of Forestry shall be exofficio fire-wardens, whose duties and powers shall be the same as, by this act, are vested in the district fire-wardens appointed by the Commissioner of Forestry; but they shall not receive any compensation other than the regular pay allowed as an employe of the Department of Forestry, and the necessary expenses by them incurred in the performance of their duties as fire-wardens.