However, for wind energy tax revenue apportioned to a school district from a wind farm producing power for the first time after June 30, 2016, one hundred percent must be retained by the school district to which the tax revenue is apportioned for the first five years of producing power, eighty percent for the sixth year, sixty percent for the seventh year, forty percent for the eighth year, twenty percent for the ninth year, and zero percent thereafter. If a wind farm begins producing power for the first time between October first and December thirty-first in a calendar year, any revenues generated for that time period must be retained by the school district and that time period may not be counted against the first five-year period; (16) "Per student equivalent," for funding calculations that are determined on a per student basis, the per student equivalent is calculated as follows: (a) Multiply the target teacher compensation times the sum of one plus the overhead rate; and (b) Divide subsection (a) by 15; (17) "Monthly cash balance," the total amount of money for each month in the school district's general fund, calculated by adding all deposits made during the month to the beginning cash balance and deducting all disbursements or payments made during the month; (18) "General fund base percentage," is determined as follows: (a) Forty percent for a school district with a fall enrollment as defined in subdivision (2) of two hundred or less; (b) Thirty percent for a school district with fall enrollment as defined in subdivision (2) of more than two hundred but less than six hundred; and (c) Twenty-five percent for a school district with fall enrollment as defined in subdivision (2) greater than or equal to six hundred. When determining the general fund base percentage, the secretary of the Department of Education shall use the lesser of the school district's fall enrollment as defined in subdivision (2) for the current school year or the school district's fall enrollment from the previous two years; (19) "Allowable general fund cash balance," the general fund base percentage multiplied by the district's general fund expenditures in the previous school year; and (20) "Alternative instruction participation adjustment," is calculated by multiplying 0.10 times the number of children who participated in the prior school year in high school interscholastic activities sanctioned or sponsored by the South Dakota High School Activities Association, as permitted by § 13-36-7 , while receiving alternative instruction pursuant to § 13-27-3 , multiplied by the per student equivalent defined in this section. Source: SL 1986, ch 126 , § 1; SL 1987, chs 130, 131; SL 1989, ch 87 , § 14; SL 1989, ch 141 , § 14; SL 1990, ch 117 , § 1; SL 1991, ch 20 , §§ 17, 18; SL 1991, ch 128 ; SL 1991, ch 129 , § 1; SL 1993, ch 81 , § 11; SL 1994, ch 112 ; SL 1995, ch 94 , § 38 as amended by 1995, ch 77, § 3; SL 1996, ch 69 , § 6; SL 1996, ch 109 ; SL 1997, ch 53 , § 2; SL 1997, ch 88 , § 1; SL 1997, ch 98 , § 10; SL 1998, ch 51 , §§ 9, 10; SL 1998, ch 59 , § 2; SL 1998, ch 59 , § 3; SL 1999, ch 82 , § 1; SL 2000, ch 84 , § 4; SL 2001, ch 77 , § 1; SL 2003, ch 97 , § 1; SL 2004, ch 125 , § 1; SL 2005, ch 96 , § 2; SL 2006, ch 75 , § 9; SL 2007, ch 93 , § 1; SL 2008, ch 76 , § 1; SL 2008, ch 77 , § 1; SL 2009, ch 76 , § 1; SL 2010, ch 81 , § 1; SL 2010, ch 82 , § 1; SL 2010, ch 83 , § 1; SL 2010, ch 84 , § 1; SL 2011, ch 89 , § 1, eff. Mar. 17, 2011; SL 2011, ch 90 , § 2; SL 2011, ch 91 , § 2; SL 2013, ch 7 , § 37; SL 2014, ch 80 , § 1; SL 2014, ch 81 , § 1; SL 2015, ch 88 , § 1; SL 2015, ch 89 , § 4; SL 2016, ch 83 , § 4; SL 2017, ch 76 , § 2; SL 2017, ch 79 , § 4; SL 2018, ch 92 , § 2; SL 2019, ch 62 , §§ 2, 3; SL 2019, ch 81 , § 2; SL 2020, ch 31 , § 2; SL 2021, ch 72 , § 1; SL 2021, ch 73 , § 4; SL 2021, ch 74 , § 1; SL 2021, ch 78 , § 2; SL 2022, ch 40 , § 1; SL 2022, ch 41 , § 2; SL 2023, ch 30 , § 2; SL 2024, ch 59 , § 2; SL 2025, ch 47 , § 2; SL 2025, ch 76 , § 1. Effective July 1, 2026