§ 30. Special police officers of corporation operating signal systems.
The police department or board of police of any city may, in addition to
the police force now authorized by law, appoint a number of persons, not
exceeding two hundred, who may be designated by any corporation
operating a system of signaling by telegraph to a central office for
police assistance, to act as special patrol officer in connection with
such telegraph system. And the persons so appointed shall, in and about
such service, have all the powers possessed by the members of the
regular force, except as they may be limited by and subject to the
supervision and control of the police department or board of police of
such city. No person shall be appointed such special police officer who
does not possess the qualifications required by such police department
or board of police for such special service; and persons so appointed
shall be subject, in case of emergency, to do duty as part of the
regular police force of the city. The police department or board of
police shall have power to revoke any such appointment at any time, and
every person appointed shall wear a badge and uniform, to be furnished
by such corporation and approved by the police department or board of
police; such uniform shall be designated at the time of the first
appointment and shall be the permanent uniform to be worn by such
special police, and the pay of such special patrol officer and all
expenses connected with their service shall be wholly paid by such
corporation, and no expense or liability shall at any time be incurred
or paid by the police department or board of police of any city, for or
by reason of the services of such persons so appointed.