Ohio Rev. Code Ann. § 3737.65 – Fire protection equipment - prohibited activities

(A) No person shall sell, offer for sale, or use any fire protection or fire fighting equipment that does not meet the minimum standards established by the fire marshal in the state fire code.
(B) Except for public and private mobile fire trucks, no person shall service, test, repair, or install for profit any fire protection or fire fighting equipment without a certificate or a provisional certificate issued by the fire marshal.
(C) The fire marshal shall not issue a provisional certificate pursuant to division (B) of this section to any individual who is not enrolled in a bona fide apprenticeship training program registered with the apprenticeship council pursuant to section 4139.05 of the Revised Code or with the bureau of apprenticeship and training of the United States department of labor. A provisional certificate issued pursuant to this section authorizes an individual to engage in the activities permitted under division (B) of this section only if the individual:
1. (1) Remains enrolled in such an apprenticeship training program; and
2. (2) Is directly supervised by an individual who possesses a valid and current certificate issued pursuant to division (B) of this section for the activities in which the individual issued the provisional certificate is engaged and the certified individual directly supervising the individual issued the provisional certificate only supervises one provisional certificate holder.