(1)护照
确认公民身份，承认持有人有权获得本国的外交及领事机关的保护和帮助权利的证书，实际上是要求外国允许护照持有人自由安全地进入和通过。护照是一主权国家允许其公民到他国旅行并返回本国及要求外国允许该公民自由安全通过的证明。

(2)(=sea letter)

• Clausula generalis non refertur ad expressa.
• Clausula quae abrogationem excludit ab initio non valet.
• clausula rebus sic stantibus
• Clausula vel dispositio inutilis per praesumptionem remotam, vel causam ex post facto non fulcitur.
• clausum
• clausum fregit
• clausum paschiae
• clausura
• clausura heyae
• claves insulae
• clavia
• clavigeratus
• clawa
• clayme
• Clay's Act
• Clayton Act
• Clayton-Bulwer Treaty
• clean
• Clean Air Acts
• clean bill
• clean bill of health
• clean bill of lading
• clean draft
• clean hands
• clean-hands doctrine