Specify as a condition or requirement in a contract or agreement; make an express demand or provision in an agreement:
— The will stipulates that she can live in the house for the rest of her life.
— The contract stipulates the dates of the payments.

synonyms: condition, qualify, specify.

Roget 769: contract, covenant, agree for; engage etc. (promise) 768.    treat, negotiate, stipulate, make terms; bargain etc. (barter) 794.    make a bargain, strike a bargain; come to terms, come to an understanding; compromise etc. 774; set at rest; close, close with; conclude, complete, settle; confirm, ratify, clench, subscribe, underwrite; endorse, indorse; put the seal to; sign, seal etc. (attest) 467; indent.    take one at one's word, bargain by inch of candle.    ... show more

Roget 770: make terms, come to terms etc. (contract) 769; make it a condition, stipulate, insist upon, make a point of; bind, tie up.   

Dutch: garanderen, specificeren, bedingen, conditioneren, stipuleren

Give a guarantee or promise of.

Make an oral contract or agreement in the verbal form of question and answer that is necessary to give it legal force.