A more thorough explanation:

SUB POTESTATE

Sub potestate means "under the power of another" in Latin. It refers to a person who is not legally independent, such as a child or someone who is not sui juris.

• A minor child is sub potestate, meaning they are under the legal authority of their parents or guardians.
• An individual with a mental disability may also be considered sub potestate, as they may not have the legal capacity to make decisions for themselves.

These examples illustrate how sub potestate refers to someone who is not legally independent and is under the control or authority of another person or entity.