Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 140, § 181B

The manager of every traveling circus, carnival or other entertainment which members of the general public are invited to attend and view shall cause a complete schedule of the prices for admission to the same, and for seating or other necessary accommodations for its patrons, to be posted, in letters at least one inch high, in a conspicuous place at every box office, ticket booth or other location at which tickets or tokens for such admission are offered for sale. Any person violating this section shall be punished by a fine of not more than fifty dollars.