51. If a member of the Board—

(a) dies,

(b) resigns,

(c) ceases to be qualified for office and ceases to hold office, or

(d) is removed from office in accordance with their terms and conditions of appointment,

the Minister may appoint a person to be a member of the Board to fill the casual vacancy so occasioned in the same manner as the member of the Board who occasioned the casual vacancy was appointed.