In accordance with section 323(1) of the Local Government Act any person who is adversely affected by a reviewable decision may apply for a review of the decision within 28 days of the decision.
Reviewable decisions are:
(a) a decision in relation to the correction of an entry in the assessment record under section 232(1) or 233(7);
(b) a regulatory order under section 286;
(c) a decision to refuse to suppress a person's details in publicly available material under section 293(5).
Any application must be made in writing and set out the grounds on which the decision should, in your opinion, be reconsidered.
Further information on how City of Darwin manages reviewable decisions can be found at Part 18.1 of the Local Government Act.