The quotation is but a small extract from old-style full powers which were still used by the United Kingdom not so long ago. Some states may still use similar antiquated nonsense. It is therefore not so surprising that an air of mystery still surrounds the topic. Admittedly, it is not the most thrilling aspect of the law of treaties, but failure to follow the complex, but clear, rules on full powers can lead to much needless extra work, vexation and, indeed, even embarrassment.

Full powers are no more than a document produced as evidence that the person named in it is authorised to represent his state in performing certain acts in relation to the conclusion of a treaty, in particular its signature. The production of full powers is a fundamental safeguard for the representatives of other states that they are dealing with a person with the necessary authority. This is equally important for the depositary of a treaty in view of the heavy responsibilities he has to discharge.