As used in this part:
(1) "Eligible function" means:
(a) a power conferred on a special district under this title;
(b) a tax or assessment levied by a special district;
(c) an act or proceeding that a special district:
(i) has taken; or
(ii) contemplates taking; or
(d) a district contract, whether already executed or to be executed in the future, including a contract for the acquisition, construction, maintenance, or operation of works for the district.
(2) "Validation order" means a court order adjudicating the validity of an eligible function.
(3) "Validation petition" means a petition requesting a validation order.
(4) "Validation proceedings" means judicial proceedings occurring in district court pursuant to a validation petition.