20-9-305. Proration and calculation of BASE funding program for joint district. (1) In joint districts, the direct state aid of a joint district must be prorated among the counties in which any part of the joint district is located for the purpose of determining the amount of each source of revenue for the direct state aid for which each county is obligated. The proration of the joint district direct state aid must be calculated as follows:

(a) Divide the joint district direct state aid by the ANB of the joint district to determine the per-ANB amount of the direct state aid.

(b) Determine the ANB for each county's portion of the joint district on the basis of each pupil's resident county. When taken together, the sum of the ANB assigned to all the counties must equal the total ANB for the joint district.

(c) Multiply the per-ANB amount of the direct state aid determined in subsection (1)(a) by the ANB for each county's portion, as determined in subsection (1)(b), to determine the portion of the direct state aid for each county.

(2) The portion of a joint district direct state aid for each county, as determined in subsection (1)(c), is a separate direct state aid amount in the county for the purposes of calculating the various revenues for the BASE funding program. After the calculation of the direct state aid revenues, the remainder of the general fund revenues must be calculated in accordance with the provisions for general fund financing.