Ind. Code § 36-7-13-2.6
(a) Except as provided in subsection (b), as used in this chapter, "gross retail incremental amount" means the remainder of:
(2) the gross retail base period amount;
as determined by the department of state revenue under section 14 of this chapter.
As added by P.L.125-1998, SEC.6. Amended by P.L.224-2003, SEC.233.