Supplemental sick leave shall only be used to replenish a portion of a teacher's sick time, upon their return to work from a sick leave. Supplemental sick leave can not be used in combination with sick leave for any one absence from work due to accident or illness, or any subsequent absence for the same, or related, accident or illness. Supplemental sick leave may not be used to extend, or bridge, the waiting period of the teacher's long term disability plan.