240 C.M.R. 7.10
(2) Every school shall display in conspicuous places or at each of its entrances, signs with lettering at least two inches in height stating the following:
ALL WORK IN THIS SCHOOL IS DONE BY STUDENTS.
CHARGES ARE FOR MATERIALS USED AND CLINIC OPERATION COSTS ONLY.
NO CHARGE FOR SERVICES.
REGULATORY AUTHORITY
240 CMR 7.00: M.G.L. c. 112, §§ 87V, 87BB and 87JJ.