(a) Subject to the limitations of this subtitle and except as provided in subsection (b) of this section, a whistleblower who voluntarily provides original information to the Comptroller in a sworn affidavit that, because of the original information, results in a final assessment in a covered enforcement action, or a successful outcome against a taxpayer in a related action, shall be entitled to receive a monetary award of at least 15% but not exceeding 30% of the taxes, penalties, and interest collected through the enforcement action or related action.

(b) A whistleblower who provides information to the Comptroller in a sworn affidavit that is related to original information previously reported to the Comptroller by another whistleblower who is eligible for an award under subsection (a) of this section may not be entitled to an award unless the information provided by the whistleblower materially adds to the information previously reported to the Comptroller.

(c) If two or more whistleblowers are eligible for an award under subsection (a) of this section arising out of the same covered enforcement action or related action: