"Report 1220" means the school district's and charter school's special education allocation report calculated and prepared by the superintendent of public instruction using the district's or charter school's nine-month average annual headcount enrollment as submitted on Form P-223H for the school year and for the 1994-95 school year the ratios and percentages established in the LEAP document for state special education program allocation as defined in WAC 392-122-105. For the purpose of special education allocations, the district's or charter school's nine-month average annual headcount enrollment shall be the average of the enrollments for the first school day of October through June.