(a) The provisions of this chapter shall apply to any eligible taxpayer who files an application for property tax amnesty within the time prescribed by the administering governing authority and does the following:

(1) Files such returns as may be required by the local official responsible for receiving returns for all tax years as stated on the application for which returns have not previously been filed and files such returns as may be required by the local official responsible for receiving returns for all tax years for which returns were filed but on which the value of the taxpayer's property was understated;

(2) Pays in full the ad valorem taxes and, if required, pays in full the interest due, for the periods applied for at the time of the application and pays the amount of any additional ad valorem tax and, if required, interest owed, as may be determined from any additional returns by the local collection official within 30 days of notification by such local collection official; and

(3) The administering governing authority may by local resolution or ordinance impose the further condition that, in addition to the requirements set forth in paragraphs (1) and (2) of this subsection, the requirement that any eligible taxpayer also pay in full within the property tax amnesty period all ad valorem taxes and, if required, penalties and interest previously levied and assessed that are final, due, and owing at the time the application or property tax amnesty tax returns are filed.

(b) An eligible taxpayer may participate in the property tax amnesty program whether or not the taxpayer is under audit, notwithstanding the fact that the amount due is based upon a proposed assessment or an assessment and without regard to whether the amount due is subject to a pending administrative or judicial proceeding. An eligible taxpayer may participate in the property tax amnesty program to the extent of the uncontested portion of any assessed ad valorem tax liability. However, participation in the program shall be conditioned upon the taxpayer's agreement that the right to protest or initiate an administrative or judicial proceeding or to claim any refund of moneys paid under the program is barred with respect to the amounts paid with the application or property tax amnesty return.

(c) The local collection official may enter into an installment payment agreement in cases of severe hardship in lieu of the complete payment required under subsection (a) of this Code section. In such cases, 25 percent of the amount due shall be paid with the application or property tax amnesty return with the balance to be paid in monthly installments not less than 25 percent of the original amount nor to exceed three months following the expiration of the property tax amnesty period. Failure of the taxpayer to make timely payments shall void the terms of the property tax amnesty program. All such agreements and payments shall, if required, include interest due and accruing during the installment agreement.

(d) If, following the termination of the property tax amnesty period, additional taxes are determined to be due from the taxpayer based upon information independent of that shown on a return filed pursuant to subsection (a) of this Code section, the local collection official shall have the authority to impose penalties only with respect to the difference between the amount shown on the property tax amnesty tax return and the correct amount of tax due. The imposition of penalties shall not invalidate any waiver granted under Code Section 48-16A-6.