OBS_VALUE: Certificates issued pursuant to the ship crew act are valid for five years from the date of issue. The  Transport Agency is authorized to issue certificates for a shorter period if the conditions for issuing certificates for five years are not met. Due to special circumstances, it is permitted to issue a temporary certificate which is valid for up to 60 days.     Certificates for ship operation and engine management on ships other than pleasure boats must be renewed every five years. Certificates that are not covered by international conventions must be renewed every ten years. When renewing a certificate, the applicant must have an appropriate telecommunications certificate and meet the same health and safety training requirements as required to obtain a certificate.