When vacancy on board deemed to have occurred

When vacancy on board deemed to have occurred. (a) A vacancy shall have occurred in the membership of any board of trustees of any school district if any member: (i) Dies; (ii) Resigns; (iii) Becomes a nonresident of the school district; or (iv) Becomes a nonresident of the trustee residence area from which elected in those districts subdivided into trustee residence areas.