Under the international law of the sea, the legislative jurisdiction of coastal
States is generally exercised at three different levels. It can be firstly assumed at
the international level. The conclusion of international conventions vith relevance
to the territorial sea, such as CTS 1958, UNCLOS and many IMO conventions or
protocols, may well demonstrate the exercise of legislative jurisdiction by States
in this sense. Under UNCLOS this jurisdiction is confirmed anev, inter alia, in
art. 211(1).^^^ Secondly, legislative jurisdiction can be exercised at regional level.
In this sense, the emergence of ten regional conventions with respect to marine
environment protection under the UNEP Regional Seas Programme may illustrate
this kind of legislative jurisdiction.