Functus officio

A person or authority whose power ends once the task is done. It cannot take up the same matter again.

• Section 362 of the Code of Criminal Procedure, 1973 (now in the Bharatiya Nagarik Suraksha Sanhita): a court cannot alter a signed judgment except to correct a clerical or arithmetical error.
• Section 32 of the Arbitration and Conciliation Act, 1996: the arbitral proceedings end with the final award.

Asked with arbitrators and courts after judgment.

Job done, power gone.

Once the task is finished, the authority has no further power over it.