A beneficial agreement which confirms one state, is to be interpreted favourably, according to the intention of the words; but an odious agreement, which destroys one state, is to be understood strictly, according to the exact meaning of the words.
Conditio ex parte extincta ex toto extinguitur.
An agreement extinguished in part, is wholly extinguished.
Conditio liberum tenementum cassans non per nuda verba sine charta valebit.
An agreement making void a free tenement, will have no weight by bare words without writing.
Conditio neminem juvabit nisi qui pars fuerit aut privus.
An agreement shall avail no one, unless he shall have been a party, or privy to it.
Conditio partim extincta in omnibus extinguitur.
An agreement extinguished in any of its parts, is extinguished in them all.
Conditiones præcedentes ad normam legis severe exigendæ; aliter de subsequentibus ubi æquitati licet damnum rei infectæ pensari.