complete power of attorney; full delegation of authority
Legal term for granting someone full authority to act on one's behalf. Used in formal contracts and official documents.
The contract includes a clause for complete power of attorney.
He entered the negotiations with full delegation of authority.
委任状 is a written document of proxy or power of attorney, while 全権委任 emphasizes the completeness of the authority granted.
代理権 is a broader term for authority to represent someone, not necessarily full or unlimited like 全権委任.
Compound of 全権 (full authority) and 委任 (delegation, entrustment). The exact historical derivation is uncertain, but the term is a standard legal expression in modern Japanese.