Ind. Code § 4-10-21-4
For purposes of section 3 of this chapter, Indiana nonfarm personal income is the estimate of total nonfarm personal income for Indiana in a calendar year as computed by the federal Bureau of Economic Analysis before December 31 immediately preceding the beginning of the first state fiscal year in a biennial budget period, using any:
As added by P.L.192-2002(ss), SEC.4.