6. In a case to which paragraph 4(2) or 5 applies and where a mover's liability referred to in that paragraph is—
(a)other than to a housing authority, the extended payment (severe disablement allowance and incapacity benefit) shall be a payment by way of rent allowance calculated in accordance with paragraph 2;
(b)to a housing authority, the extended payment (severe disablement allowance and incapacity benefit) shall be by way of a rent rebate to the value of the lesser of—
(i)such part of the rent in respect of the period specified in regulation 53(6)(a) as is eligible for housing benefit, calculated in accordance with regulations 11 to 13, less, in a case where the rebate to which paragraph 5 refers, or the rent allowance to which paragraph 4 refers, as the case may be, was subject to any deductions in respect of non-dependants pursuant to regulations 50 and 55, the amount of those deductions; or
(ii)the amount of extended payment (severe disablement allowance and incapacity benefit) calculated in accordance with paragraph 2.