Power to forfeit unclaimed land:

"A pass-holder may at any time during the period of the pass relinquish the whole or part of his estate after paying all the revenue and taxes due from him in respect of the estate proposed to be relinquished, by a written petition to the Administrator within such date as may be prescribed, and on such relinquishment being accepted by the Administrator, the pass holder shall cease to have an rights and interests whatsoever conferred on him by the pass on the relinquished land."