Sec. 20. "Basin" has the following meaning:
(1) For purposes of IC 14-13-9, the meaning set forth in IC 14-13-9-1.
(2) For purposes of IC 14-25-1, the meaning set forth in section 1.2 of IC 14-25-15-1.
(3) For purposes of IC 14-25-17, the meaning set forth in IC 14-25-17-3.
(4) For purposes of IC 14-30-2, the meaning set forth in IC 14-30-2-1.
(5) For purposes of IC 14-30-3, the meaning set forth in IC 14-30-3-1.
(6) For purposes of IC 14-30-4, the meaning set forth in IC 14-30-4-1.