In general The term “thrifty food plan” means the diet required to feed a family of 4 persons consisting of a man and a woman ages 20 through 50, a child ages 6 through 8, and a child ages 9 through 11 using the items and quantities of food described in the report of the Department of Agriculture entitled “Thrifty Food Plan, 2021”, and each successor report updated pursuant to this subsection, subject to the conditions that—