In this Act,
(a) the expression "custom" and "usage" signify and rule which, having been continuously and uniformly observed for a long time, has obtained the force of law among Hindus in any local area, tribe, community, group or family:
Provided that the rule is certain and not unreasonable or opposed to public policy and Provided further that, in the case of a rule applicable only to a family, it has not been discontinued by the family;
(b) Maintenance include-
(i) in all cases, provision for food, clothing, residence, education and medical attendance and treatment,
(ii) in the case of an unmarried daughter, also the reasonable expenses of an incident to her marriage,
(c) "minor" means a person who has not completed his or her age of eighteen years.