WordNet sense 1 (a group of representatives or delegates):

delegation, deputation, mission, delegacy

WordNet sense 2 (a special group delegated to consider some matter):

committee

WordNet sense 3 (a formal statement of a command or injunction to do something):

charge, direction

WordNet sense 4 (an official document issued by a government and conferring on the recipient the rank of an officer in the armed forces):

military commission

WordNet sense 5 (the act of granting authority to undertake certain functions):

commissioning

WordNet sense 6 (the act of committing a crime):

committal, perpetration