The trustees of any reservation may, subject to any order of the court,—
(a) authorise activities on the reservation by any person or class of persons:
(b) issue permits in relation to any activity on a reservation:
(c) apply to the court for any directions in relation to the administration of the reservation, and the powers and obligations of the trustees:
(d) call meetings of interested persons in relation to the administration of the reservation:
(e) appoint and employ, on behalf of the trustees, such advisers as the trustees think fit, for the purposes of enabling their better administration of the reservation.