s that are not required for other versions. [Archives] 
authority 
n., The right or permission to act legally on another's behalf; esp., the power of one person to affect another's legal relations by acts done in accordance with the other's manifestations of assent; the power delegated by a principal to an agent. [Government] 
n., Ability to persuade others by argument or example to accept one's decisions. [Sciences] 
n., The knowledge and experience that qualifies a person to write or speak as an expert on