(b) The following definitions apply to this section:
(1) "Autism" means "autism" as that term is defined in section one, article sixteen, chapter forty-four of this code.
(2) "Child with autism" means "child with autism" as that term is defined in section one, article sixteen, chapter forty-four of this code.
(3) "Guardian" means "guardian" as that term is defined in section one, article sixteen, chapter forty-four of this code.
(4) "Parent" means a "parent" as that term is defined in section one, article sixteen, chapter forty-four of this code.
(5) "Qualified trust for a child with autism" means "qualified trust for a child with autism" as that term is defined in section one, article sixteen, chapter forty-four of this code.
(c) If it appears upon audit or otherwise that any person or entity has taken the decreasing modification allowed under this section and was not entitled to take the decreasing modification, or has withdrawn funds from the qualified trust for a child with autism in a way not consistent with the requirements of article sixteen, chapter forty-four of this code, then an assessment shall be made and the income tax liability of the taxpayer shall be recomputed disallowing the decreasing modification so taken. Such assessment shall not be barred by any statute of limitations otherwise applicable to the tax imposed pursuant to this article. Amended returns shall be filed for any tax year for which the decreasing modification was improperly taken. Any additional taxes due under this chapter shall be remitted with the amended return or returns filed with the Tax Commissioner, along with interest, as provided in section seventeen, article ten of this chapter and such other penalties and additions to tax as may be applicable pursuant to the provisions of article ten of this chapter.
(d) Married parents who qualify for the modification provided under this section and who file separate state tax returns shall each receive the modification provided in this section in an amount equal to the amount of contributions made by the parents into the trusts, not to exceed $1,000 each.
(e) Joint guardians who qualify for the modification provided under this section and who file separate state tax returns shall each receive the modification provided in this section, in an amount equal to the amount of contributions made by the guardians into the trust, not to exceed $1,000 each.
(f) In the event the parents or guardians of a child with autism, claiming the modification provided under this section, become divorced or legally separated, each party shall be allowed to claim the amount of unused carryforward modification that remains available under this section according to the terms of an agreed property settlement approved by the divorce court which specifically addresses the unused carryforward modification. In the event that no property settlement specifically addressing the unused carryforward modification exists relating to the divorce or legal separation, then any unused carryforward modification remaining at the time of the divorce or legal separation is granted shall be evenly divided between the parties.
(g) The Tax Commissioner may propose rules necessary to carry out the provisions of this section and to provide guidelines and requirements to ensure uniform administrative practices statewide to effect the intent of this section, all in accordance with the provisions of article three, chapter twenty-nine-a of this code.