307. Prohibition on proceeding to sea without certificates.- (1) No Indian passenger ship shall proceed on a voyage from any port or place in India to any port or place outside India unless there is in force in respect of the ship either- (a) a safety certificate issued under section 299; or (b) a qualified safety certificate issued under section 299 and an exemption certificate issued under section 302; being a certificate which by the terms thereof is applicable to the voyage on which the ship is about to proceed and to the trade in which she is for the time being engaged. (2) No sea-going India ship, of five hundred tons gross or more, not being a passenger ship, shall proceed on a voyage from any place in India to any place outside India unless there is in force in respect of the ship- (a) such certificate or certificates as would be required in her case by the provisions of sub-section (1) if she were a passenger ship, or (b) a safety equipment certificate issued under section 300 and a safety radio telegraphy certificate, as the case may be, a safety radio telephony certificate issued under section 301, or (c) a qualified safety equipment certificate issued under section 300 and an exemption certificate issued under section 302 being certificates which by the terms thereof are applicable to the voyage on which the ship is bout to proceed and to the trade in which she is for the time being engaged. (3) No sea-going Indian ship of five hundred tons gross or more, not being a passenger ship, shall proceed on a voyage between ports or places in India unless there is in force in respect of the ship- (a) an equipment certificate issued under section 300; (b) a qualified equipment certificate issued under section 300 and an exemption certificate issued under section 302; (c) a radio telegraphy certificate or a radio telephony certificate issued under section 301 or an exemption certificate issued under section 302; being a certificate which by the terms thereof is applicable to the voyage on which the ship is about to proceed and to the trade in which she I for the time being engaged. (4) The master of every ship to which this section applies shall produce to the customs collector from whom a port clearance for the ship is demanded the certificate or certificates required by the foregoing provisions of this section to be in force when the ship proceeds to sea, and the port clearance shall not be granted and the ship may be detained until the said certificate or certificates are so produced. | 
