A member of the Central Authority may, by notice in writing under his hand addressed to the Central Government, resign his office:
     Provided that a member shall, unless he is permitted by the Central Government to relinquish his office sooner, continue to hold office until the expiry of three months from the date of receipt of such notice or until a person duly appointed as his successor enters upon the office or until the expiry of his term of office, whichever is the earliest.