105 ILCS 125/4

Accounts; copies of menus served; free lunch program required; report. School boards and welfare centers shall keep an accurate, detailed and separate account of all moneys expended for school breakfast programs, school lunch programs, free breakfast programs, free lunch programs, and summer food service programs, and of the amounts for which they are reimbursed by any governmental agency, moneys received from students and from any other contributors to the program. School boards and welfare centers shall also keep on file a copy of all menus served under the programs, which together with all records of receipts and disbursements, shall be made available to representatives of the State Board of Education at any time.

Every public school must have a free lunch program.