6. Decision on the question as to disqualification on the ground of defection.

(a) in a case falling under clause (a) of sub section (1) after the Member gives up the membership of the political party:
(b) in a case falling under clause (b) of sub section (1), after the expiry of fifteen days specified therein;
(c) in a case falling under sub-section (2) after he joins the political party.