Assumptions as to deductions from the gross amount
4. Where—
(a)a decision has not been made by the authority under subsection (3) of section 47 of the Act as to whether or not that section will apply on one or more relevant days as regards a hereditament other than a hereditament in relation to which the condition in section 47(2)(a) applies, and
(b)a reduction or remission of rates has been granted by the authority as regards the hereditament and has effect for the immediately preceding year under section 47(1)(a) of the Act,
it shall be assumed for the purpose of calculating the amount described in paragraph 3(1)(b) of Schedule 1 to these Regulations that such reduction or remission will apply as regards the hereditament, in respect of each relevant day, as if it had been made under section 47(1)(a) of the Act in respect of each such day.