Notwithstanding paragraphs (1) and (2), an individual who lives with others, who is sixty years of age or older, and who is unable to purchase food and prepare meals because such individual suffers, as certified by a licensed physician, from a disability which would be considered a permanent disability under section 221(i) of the Social Security Act ( 42 U.S.C. 421(i) ) or from a severe, permanent, and disabling physical or mental infirmity which is not symptomatic of a disease shall be considered, together with any of the others who is the spouse of such individual, an individual household, without regard to the purchase of food and preparation of meals, if the income (as determined under section 2014(d) of this title ) of the others, excluding the spouse, does not exceed the poverty line, as described in section 2014(c)(1) of this title , by more than 65 per centum.