5The rate of pension of a scheme member who retires before attaining the retiring age on the ground that he has become incapable through infirmity of performing the duties of his office shall be the rate of pension to which he would have been entitled if he had continued to perform until the retiring age pensionable service of the kind he was performing immediately before retirement and had then retired.
6The rate of pension of a scheme member who ceases to perform pensionable service before attaining the retiring age without receiving a pension in respect of that service and who subsequently before attaining that age satisfies the Board that he has become incapable through infirmity of performing pensionable service, shall be the rate of pension to which he would have been entitled if he had attained the retiring age on the date on which he ceased to perform pensionable service.