Even though Article 23 of the 1982 Convention on the Law of the Sea explicitly acknowledges the right of innocent passage through the territorial sea to nuclear vessels, many coastal states have recently forbidden or submitted to authorization the passage of ships carrying radioactive materials: this reveals a trend towards a more restrictive concept of “innocent passage.” As to straits used for international navigation and archipelagic sea lanes, the ius communicationis is still prominent and every measure that might prejudice the navigational rights of nuclear ships would not be consistent with the Montego Bay Convention.