español al inglés Jurídico/Patentes Derecho: contrato(s)

I am proofreading this translation of a contract, that was originally translated (years ago) from English to Spanish for a restaurant chain in Nevada. Sort of a back translation, full of really bad Spanish, but has some lexicon common found in traditional Mexican legal texts.

The phrase above is a clause title. The translator originally had it rendered as "Scope of the Agreement Term", which was not convincing to me. I thought of changing it to "Required Agreement Term" but the sole sentence under the clause left me reconsidering. Literally reading as "El tiempo está expresamente declarado para ser la esencia de este Convenio." This does not seem to match what a "Time is of the Essence" Clause would state, but perhaps this is what the original author intended (?)

Any thoughts on this?