Section 15C. Any person who shall wilfully refuse to yield or surrender the use of a party telephone line to another person for the purpose of permitting such other person to report a fire or to summon police, medical or other aid in case of emergency and any person who shall ask for or request the use of such party line on pretext that such an emergency exists knowing that no such emergency in fact does exist shall be guilty of a misdemeanor, and shall be punished by a fine of not less than fifty dollars nor more than five hundred dollars. Every telephone company doing business in the commonwealth shall print a copy of this section in a prominent place in each telephone directory published by it.