joint control; joint rule
Used in political, business, or legal contexts where two or more parties share authority or management over a territory, organization, or asset.
The region is under joint control by two countries.
A joint control agreement was concluded.
共同統治 is more common for joint governance or rule, especially in political contexts, while 共同支配 can also refer to joint management or control in business settings.
Compound of 共同 (joint, cooperative) and 支配 (control, rule).