(4)Every person applying for employment as an employee of a Board shall, if he is related by blood or marriage to any member of the Board or to any person not being a lower grade employee, in receipt of remuneration from the Board, notify the fact and the nature of such relationship to the appointing authority before the appointment is made, and if he has failed to do so, his appointment shall be invalid but without prejudice to the validity of anything previously done by him.
