The number of Trustees shall not be less than 7 nor more than 9. If at any time they shall be reduced to a less number than 7, by death, resignation, or removal out of Baltimore City, or otherwise, it shall be the duty of the remaining Trustees to fill each vacancy within 30 days after its occurrence. If they do not fill such vacancy within said period, it shall be the duty of the President of the Board to notify the Mayor of the City of Baltimore of the fact of said vacancy, and thereupon it shall be the duty of the Mayor to appoint some person to fill such vacancy or vacancies as often as they may occur in manner aforesaid, and the person so appointed shall be and become one of the Trustees to all intents and purposes. City Code, 1879, art. 34, §3 1893, art. 34, §3 1927, art. 26, §3 1950, art. 20, §2 1966, art. 1, §61 1976/83, art. 1, §56 Ord. 1868-068