If sixty percent of the number of local school boards located in an area education agency, or if local school boards representing sixty percent of the enrollment in the school districts located in the agency, request in writing to the area education agency board that an additional service be provided them, for pupils in grades kindergarten through twelve or children requiring special education as defined in section 256B.2 or for employees or board members of school districts or area education agencies, the area education agency board shall arrange for the service to be provided to all school districts in the area within the financial capabilities of the area education agency.