(5) Without prejudice to the generality of section 7C(1)(b) or 7D, the amount of the prescribed subvention that is applicable to a dependent person shall, by virtue of this section, be reduced by the amount by which such person's means, as determined in the assessment referred to in section 7B(3) or review under section 7D, as the case requires, made in respect of such person, exceeds the weekly rate of—