19. Entry into treaties and other treaty actions.

As a constitutional matter, the power to negotiate, conclude, consent to be bound by, amend and withdraw from treaties on behalf of the United Kingdom is a prerogative exercisable by the executive, generally without the need for parliamentary authority1 and not subject to review by the courts2. The power extends to entering, modifying, and withdrawing reservations and interpretative declarations to treaties and to objecting to the same; to making, modifying, and withdrawing any other declaration or notification envisaged by a treaty