stand upon (v.) 4
depend on, rely upon, hinge on
2H4 III.ii.143 [Falstaff to Shallow, of Wart] his apparel is built upon his back, and the whole frame stands upon pins
MND I.i.139 [Lysander to Hermia] The course of true love never did run smooth; / But either it was different in blood ... Or else it stood upon the choice of friends