Русско-англо-русский юридический словарь

A declaration of war is a formal act by which one nation goes to war against another. The declaration is a performative speech act (or the signing of a document) by an authorized party of a national government, in order to create a state of war between two or more states. (Wikipedia)

What is IN WITNESS WHEREOF? The expression that makes it clear that a person signing a legal document is signing it as a witness.

The initial words of the concluding clause in deeds: "In witness whereof the said parties have hereunto set their hands," etc. A translation of the Latin phrase "in cuius rei testimonium." (Black's Law Dictionary)

Within 5 business days of signing this Agreement, the Company and Mix will enter into a Definitive Binding Agreement and upon executing such agreement, Mix will receive One Hundred and Twenty thousand dollars ($120,000) USD as a refundable cash deposit towards the purchase of Assets. (Memorandum of Understanding)

"[A ""reservation"" is a] formal declaration by which a State, when signing, ratifying or acceding to a treaty, specifies as a condition of its willingness to become a party to the treaty certain terms which will limit the effect of the treaty [...]." (International Law: Reservations to Multilateral Agreements)