Indiana Code Title 20. Education § 20-25-12-5

Sec. 5. The initial approved general fund budget (for budgets before January 1, 2019) or the initial approved budget of the education fund (for budgets after December 31, 2018) for each school for a school year must be, as nearly as is reasonable and practicable, proportionate to the total general fund budget (for budgets before January 1, 2019) or the total education fund budget (for budgets after December 31, 2018) for the school city in the same ratio as the school's estimated current ADM for the fall count in the school year compares to the school city's estimated current ADM for the fall count for that school year.