His rights in the allotment are subject to the fairly extensive powers of cancellation under the Act and rules as then in force prior to July 22, 1952, on varied administrative considerations and actions such as the following (Clause 6 and subsequent rules of 1951): (a) That the allotment is contrary to the orders of the Punjab Government or the instructions of the Financial Commissioner, Relief and Rehabilitation, or of the Custodian, Evacuee Property, Punjab; (b) That the claims of other parties with respect to the land have been established or accepted by the Custodian or the Rehabilitation Authority; (c) That it is necessary or expedient to cancel or vary the terms of an allotment for the implementation of resettlement schemes and/or rules framed by the State Government; or for such distribution amongst displaced persons as appears to the Custodian to be equitable and proper; 1286 (d) That it is necessary or expedient to cancel or vary the terms of an allotment for the preservation, or the proper administration, or the management of such property or in the interests of proper rehabilitation of displaced persons.