It's not actually wrong, but one comment I would make is that "it's" is informal while the rest of the sentence ("stipulated", and the use of the subjunctive) is formal.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Persian LearnerI think this question is wrong from scratch because there is more than one correct answer. Don't you think so?Yes.