law: 28. Qualification of electors.
  (1) Every person who, on such date as may be fixed by the Central Government in this behalf by notification in the Official Gazette here in after in this section referred to as "the qualifying date
  ", is not less than eighteen years of age and who has resided in the cantonment for a period of not less than six months immediately preceding the qualifying date shall, if not otherwise disqualified, be entitled to be enrolled as an elector.
  Explanation.
  When any place is declared a cantonment for the first time, or when any local area is first included in a cantonment, residence in the place or area comprising the cantonment on the aforesaid date shall be deemed to be residence in the cantonment for the purposes of this sub-section.
  (2) A person notwithstanding that he is otherwise qualified, shall not be entitled to be enrolled as an elector if he on the qualifying date
  (i) is not a citizen of India, or
  (ii) has been adjudged by a competent court to be of unsound mind, or
  (iii) is an undischarged insolvent, or
  (iv) has been sentenced by a Criminal Court to imprisonment for a term exceeding two years for an offence which is declared by the Central Government to be such as to unfit him to become an elector or has been sentenced by a Criminal Court for any offence under Chapter IXA of the Indian Penal Code (45 of 1860):
  Provided that any disqualification incurred by a person under clause (iv) shall terminate on the lapse of three years from the expiry of the sentence or order.
  (3) If any person having been enrolled as an elector in any electoral roll subsequently becomes subject to any of the disqualifications referred to in sub-section (2), his name shall be removed from the electoral roll unless, in the case referred to in clause (iv), the disqualification is removed by the Central
  Government.