The proposed measure provides that every former public employee, other than a judge, who is pensioned or retired for disability, shall report to his retirement authority, annually, his earnings from gainful occupation during the preceding year; and that if such earnings, plus the pension, exceed the regular compensation of the position formerly held, the pensioner shall refund that portion of his pension equal to such excess or the entire pension if such excess is greater than the pension. A refund, if required, shall not include any part of a pension represented by salary deductions from or special purchase by the former employee. The requirement of a refund is not applicable to income received in or prior to 1958.