The department shall issue a certificate of inspection for each boiler inspected upon receipt of an inspection report certifying that the boiler is in a safe condition to be operated. The department shall charge a fee of thirty-five dollars per year for each year that a certificate is valid, or part of a year thereof, for each certificate of inspection issued as the result of inspections authorized under sections 23.1-16-07 and 23.1-16-08. The fees are the liability of the owner or user and must be paid in accordance with rules adopted by the department. A certificate may not be issued for any boiler not in a safe condition to be operated or for a boiler for which the inspection and certificate fees have not been paid in full. A certificate is not valid for a period of more than thirty-six months for power boilers described in subsection 2 of section 23.1-16-07, and no more than twelve months for other power boilers, twelve months for steam traction engines, and thirty-six months for low-pressure boilers except that a two-month grace period may be extended for any certificate. Upon written request from a special inspector, the chief boiler inspector may issue a short-term certificate. Each certificate of inspection must be posted conspicuously under glass in the boiler room or adjacent to the boiler inspected.