R-11, r. 3 - Teachers Supplementary Pension Plan

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4. For the purposes of section 3, a teacher has a physical or mental disability if that teacher suffers from a severe and prolonged medical condition.
A medical condition is severe if by reason thereof the teacher is totally incapable of performing the work required by his or her position for an extended period of time.
A medical condition is prolonged if it is expected to last indefinitely, that is, if it is unlikely that a cure is possible in the current state of medical knowledge.
T.B. 195706, s. 4.