²[151J. For the purpose of this Chapter- (a) “family” in relation to a person includes such person and his wife, son, unmarried daughter, son's wife, son's son and son's unmarried daughter: Provided that an adult and married son who has been living in a separate mess independently of his parents continuously since ³[* * *] before the 16th day of December, 1971, and his wife, son and unmarried daughter shall be deemed to constitute a separate family: Provided further that in the cases of lands held under wakf, wakf-al-al-aulad, debuttar or any other trust where the beneficiaries have no right to alienate such lands as their personal property, all such beneficiaries together shall be deemed to constitute a separate family in relation to such land; and (b) “head of a family” means- (i) in cases other than those mentioned in the second proviso to clause (a) the person, male or female, in relation to whom a family is determined by the Revenue-officer in the prescribed manner, and (ii) in the cases mentioned in the second proviso to clause (a), the Mutawalli, Sebait or Trustee, as the case may be.]]