Stipulate
verb
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”
Similar: qualify, condition, specify
verb
make an oral contract or agreement in the verbal form of question and answer that is necessary to give it legal force
verb
give a guarantee or promise of
“They stipulated to release all the prisoners”