§ 15. Firefighters moving from one city to another. The firefighters
of the different cities of this state, in case of removal from one city
to another, shall be allowed the time which they have served as such
firefighters in the city they left, in the city to which they have
removed, upon producing a certificate of such service, signed by the
chief of the city so left, and being appointed firefighters in the city
to which they have removed.