This question refers to Wesley Newcomb Hohfeld's analysis of jural relations, which breaks down legal concepts into pairs of correlatives and opposites.
A power is one person's ability to alter the legal relations of another person (e.
g.
, the power to make a will and change an heir's legal status).
An immunity is another person's freedom from having their legal relations altered by someone else.
Therefore, if person A has a 'power' to affect person B, it logically implies that person B does not have (i.
e.
, has an 'absence of') an 'immunity' from being affected by A.
The presence of power in one person means the absence of immunity in the person they can affect.