§ 204. Subpoenaing hearing referees. No officer or employee of the
department of motor vehicles who has conducted a hearing concerning an
owner or operator of a motor vehicle or motorcycle shall be required to
appear in any court as a witness in a civil action in which such owner
or operator is a party except pursuant to a subpoena signed by a judge
of a court of record, or a judge of the court in which the action is
pending, issued upon an application to such judge after, at least, one
day's notice to the commissioner or a deputy commissioner of motor
vehicles.