Answer:
agency coupled with an interest
Explanation:
Agency combined with such an involvement is where an agent retains custody or influence of his principal's property and holds constitutional rights towards third party intervention.
This is an organisation arrangement where an estate or interest in the property is granted to the agent as being the target of just the agency.
It is distinct from cases where an agent benefits solely from transactions, or gains from them. An agency partnered with such an importance could also be described as a force coupled with an interest, or even as a protection authority.