be in the gift of somebody

Từ điển Oxford Advanced Learner 8th

be in the gift of sb | be in sb's ˈgift idiom
(especially BrE)if sth such as an important job or a special right or advantage is in sb's gift, that person can decide who to give it to
•All such posts are in the gift of the managing director (= only given by the managing director).
Main entry: ↑gift_idiom