he shall be deemed to have expended for living expenses (in connection with his trade or business as a legislator) an amount equal to the sum of the amounts determined by multiplying each legislative day of such individual during the taxable year by the greater of—
(i)#
the amount generally allowable with respect to such day to employees of the State of which he is a legislator for per diem while away from home, to the extent such amount does not exceed 110 percent of the amount described in clause (ii) with respect to such day, or
(ii)#
the amount generally allowable with respect to such day to employees of the executive branch of the Federal Government for per diem while away from home but serving in the United States, and