The department shall enforce the regulations adopted pursuant to section 29-203, and shall inspect the construction, operation and maintenance of passenger tramways to determine whether such regulations have been complied with by the operators. Each passenger tramway shall be thoroughly inspected by a qualified inspector approved by the department at least once every twelve months. More frequent inspections of any passenger tramway may be made if the condition thereof indicates that additional inspections are necessary or desirable. As soon as the department inspects and approves any passenger tramway as being fit for operation, it shall issue to the operator, upon receipt of a fee of two hundred dollars, a certificate of operation with such conditions and limitations as the commissioner shall prescribe. Such certificate shall be valid for twelve months and shall be renewed yearly, if the department approves the passenger tramway, upon payment of a renewal fee of one hundred dollars. No passenger tramway may be operated without such operating certificate.