(1) The commissioner, after conducting a review of a decision (other than a review under section 84), must make a written decision—
(a) affirming the decision; or
(b) varying the decision; or
(c) setting aside the decision and making a decision in substitution for the decision.
(2) The commissioner must include in the decision the reasons for the decision.
(3) The commissioner must give a copy of the decision to each participant.
(a) a document is to be released because of the review; and
(b) the commissioner has notified a person under section 83(5) and the person did not become a participant in the review; the commissioner must take reasonable steps to notify the person of the release.
(5) The commissioner may arrange to have decisions published.