The legal framework for implementing sanctions measures in the Bailiwick has changed as a result of Brexit, with effect from 31st December 2020.
These changes are made by the Sanctions (Implementation of UK Regimes) (Bailiwick of Guernsey) (Brexit) Regulations, 2020 (available here [673kb]). The overarching effect of these regulations is to change the Bailiwick's sanctions framework from one that implements targeted financial sanctions and other measures under EU sanctions regimes to one that implements those measures under UK sanctions regimes. The UK regimes also implement UN regimes, including for example those that relate to terrorist financing and the financing of the proliferation of weapons of mass destruction.
This is largely a technical change, as the UK sanctions regimes broadly replicate the EU sanctions regimes that they replace. However, it is important to be aware that there are some differences, both as to the scope of the UK sanctions regimes themselves and as to the persons that are designated under those regimes.