Every public utility shall file with the public utilities commission, and shall print and keep open to public inspection, schedules showing the rates, fares, charges and prices for any service rendered or to be rendered in accordance with the rules adopted by the commission pursuant to RSA 541-A; provided, however, that public utilities which serve as seasonal tourist attractions only, as determined in accordance with rules adopted by the commission pursuant to RSA 541-A, shall be exempt from the provisions of this chapter.