At ports in England The Public Health (Ships) (England) Regulations 1979, as amended, apply, implementing provisions of the International Health Regulations (2005) on ship sanitation certificates. Equivalent Scotth, Welsh and Northern Ireland regulations apply at ports in Scotland, Wales Northern Ireland respectively.
The master of a UK ship must ensure that, when the ship enters a VTS area in the territorial waters of an EEA State (i. e. an EU Member State, Norway or Iceland), the ship must comply with the rules of the VTS if they are in accordance with IMO Guidelines. The master of a non-UK ship must ensure that, when the ship enters a VTS area in UK territorial waters, the ship must comply with the published or promulgated VTS rules.
Where a port State authority requires that specific ballast water procedures and/or treatment option(s) be undertaken, and due to weather, sea conditions or operational impracticability such action cannot be taken, the master should report this fact to the port State authority as soon as possible and, where appropriate, prior to entering seas under its jurisdiction. (BWM Guidelines, 8.1.1)