law: Pharmacy Act, 1948 
  7. Term of office and casual vacancies.
  (1) Subject to the
  
  provisions of the section, a nominated or elected member 22[***]
  
  shall hold office for a term of five years from the date of his nomination or
  
  election or until his successor has been duly nominated or elected, whichever
  
  is longer.
  (2) A nominated or
  
  elected member may at any time resign his membership by writing under his hand
  
  addressed to the President, and the seat of such member shall thereupon become
  
  vacant.
  (3) A nominated or
  
  elected member shall be deemed to have vacated his seat if he is absent without
  
  excuse, sufficient in the opinion of the Central Council, from three
  
  consecutive meeting of the Central Council or if he is elected under clause
  
  (a), (c) or (g) of section 3, if he ceases to be a member of the teaching
  
  staff, Medical Council of India or a registered pharmacist, as the case may be.
  (4) A Casual vacancy
  
  in the Central Council shall be filled by fresh nomination or election, as the
  
  case may be, and the person nominated or elected to fill the vacancy shall hold
  
  office only for the remainder of the term for which the member whose place he
  
  takes was nominated or elected.
  (5) No act done by the
  
  Central Council shall be called in question on the ground merely of the
  
  existence of any vacancy in, or defect in the constitution of, the Central
  
  Council.
  (6) Members of the
  
  Central Council shall be eligible for re-nomination or re-election.