Section 27B. No person other than an employee in the service of the commonwealth or any political subdivision thereof or in the service of an independent contractor acting for the commonwealth or any such subdivision shall pile, push or plow snow or ice on or against any fire hydrant or other similar device used for fire protection which is located in any public or private way so as to conceal such hydrant or device or cover any outlet thereof. Whoever violates this section shall be punished by a fine of not more than one hundred dollars.