1. The coastal State shall not hamper the innocent passage of foreign

ships through the territorial sea except in accordance with this Convention.

In particular, in the application of this Convention or of any laws or

regulations adopted in conformity with this Convention, the coastal State shall not:

(a) impose requirements on foreign ships which have the practical

effect of denying or impairing the right of innocent passage; or

(b) discriminate in form or in fact against the ships of any State or

against ships carrying cargoes to, from or on behalf of any

State.

2. The coastal State shall give appropriate publicity to any danger to

navigation, of which it has knowledge, within its territorial sea.

Source: UNCLOS