The calculation of the three-year rolling average of ADM for each school and for the entire Bureau-funded school system will be phased-in as shown in the following table.
| Time period | How OIEP must calculate ADM |
|---|---|
| (a) First school year after May 31, 2005 | Use the prior 3 years' count period to create membership for funding purposes |
| (b) Second school year after May 31, 2005 | (1) The academic program will use the previous year's ADM school year and the 2 prior years' count periods; and (2) The residential program will use the previous year's count period and the 2 prior years' count weeks |
| (c) Each succeeding school year after May 31, 2005 | Add one year of ADM or count period and drop one year of prior count weeks until both systems are operating on a 3-year rolling average using the previous 3 years' count after period or ADM, respectively. |