12. For regulation 50 (maximum housing benefit) substitute—
“50. The amount of a person's appropriate maximum housing benefit in any week shall be 100 per cent. of his eligible rent calculated on a weekly basis in accordance with regulations 61 and 62 (calculation of weekly amounts and rent free periods) less any deductions in respect of non-dependants which fall to be made under regulation 55 (non-dependant deductions).”