PROVISO
provision, proviso
(noun) a stipulated condition; “he accepted subject to one provision”
Source: WordNet® 3.1
Etymology
Noun
proviso (plural provisos or provisoes)
A conditional provision to an agreement.
Source: Wiktionary
Pro*vi"so, n.; pl. Provisos. Etym: [L., (it) being provided, abl. of
provisus, p. p. of providere. See Provide, and cf. Purview.]
Definition: An article or clause in any statute, agreement, contract,
grant, or other writing, by which a condition is introduced, usually
beginning with the word provided; a conditional stipulation that
affects an agreement, contract, law, grant, or the like; as, the
contract was impaired by its proviso.
He doth deny his prisoners, But with proviso and exception. Shak.
Source: Webster’s Unabridged Dictionary 1913 Edition