stipulate
/ˈstɪpjuleɪt; `stɪpjəˌlet/ v[Tn, Tf]
(fml 文) state (sth) clearly and firmly as a requirement 讲明, 规定（某要求）
I stipulated red paint, not black. 我已讲明要红漆, 不要黑漆.
It was stipulated that the goods should be delivered within three days. 按规定货物须在三日内送交.