Each school district, county superintendent of schools, and other public or private entity that participates in programs under the National School Lunch Act, as amended, and as prescribed by Chapter 13 (commencing with Section 1751) of Title 42 of the United States Code, may, if consistent with federal law, offer whole milk, in addition to other kinds of milk, if federal regulations require a lunch eligible for federal cash reimbursement under the act to contain unflavored, fluid lowfat milk, skim milk, or buttermilk.