Subject to the Memorandum of Agreement regarding short term disability the Board of Trustees agree to pay the cost of a short term disability plan for teachers. This plan will be used to pay benefits for personal illness after sick leave is exhausted, for the balance of the Long Term Disability Plan waiting period of eighty (80) working days from the last day worked. If the teacher does not qualify for LTD the benefits are paid to the one hundred and thirty-fifth (135th) calendar day from the last day worked.