1(1)The rebate or allowance to which a tenant is entitled under a scheme shall be a weekly amount calculated in accordance with this Schedule by reference to—
(a)an amount to be allowed for the needs of the tenant and of any spouse of the tenant or dependent child of the tenan or his spouse (" the needs allowance ");
(b)the income of the tenant and of any such spouse ;
(c)the amount of the rent;
(d)a minimum weekly rent;
(e)a minimum and maximum rebate or allowance ;
(f)amounts to be deducted for non-dependants.
(2)The amounts listed in sub-paragraph (1) above (other than the amount of the rent) shall be ascertained in accordance with this Schedule.
(3)A scheme shall not apply to rent payable in respect of any part of a rental period before the date on which the scheme is made or, if it is expressed to come into force after that date, before the date on which it is expressed to come into force.
(4)No person shall be entitled to benefit under more than one scheme.