Amends the Regional Board of School Trustees Article of the School Code. Provides that a vacancy on a regional board of school trustees shall be subject to the residency provisions in the Article unless the vacancy occurs in a single county educational service region (instead of providing that any vacancy is subject to the residency provisions in the Article). Provides that if a vacancy occurs in a single county educational service region, then the vacancy may be filled by a person who is a resident of a congressional township not represented on the board. Effective immediately.