(idiom) to decide or take action for oneself without asking for permission or consulting others; to act on one's own authority

(idiom) to be in charge of one's own house; to have the power to make decisions within a group or organization

to make decisions on one's own without authorization or consulting others; to act entirely according to one's own will

the guest becomes the host; to turn a passive position into an active one or to change a secondary role into a primary one

to make decisions or act without authorization or consultation; to take matters into one's own hands