Some Administrations had exempted cargo ships from compliance with SOLAS and the International Ship and Port Facility Security Code by allowing them to use their gross tonnages determined in accordance with national tonnage rules.
一些行政当局豁免货船遵守《安全公约》和《国际船舶和港口设施保安规则》，允许这些船舶按照本国吨位规则确定总吨位。