Membership of both Houses
A person cannot remain a member of both Houses of Parliament. Parliament may provide by law for vacation of one of the seats where a person is chosen to both Houses.
Membership of Parliament and a State Legislature
A person cannot continue as a member both of Parliament and of a House of a State Legislature. Where a person is chosen to both, the Parliamentary seat becomes vacant after the period specified under the applicable Presidential rules unless the State Legislature seat has already been resigned.
Disqualification and resignation
A seat becomes vacant if a member becomes subject to a disqualification referred to in Article 102(1) or Article 102(2). A member may also resign by writing addressed to the Chairman or Speaker, as applicable. A resignation is not to be accepted where, after appropriate inquiry, the Chairman or Speaker is satisfied that it is not voluntary or genuine.
Absence for sixty days
If a member is absent without permission from all meetings of the House for sixty days, the House may declare the seat vacant. Periods during which the House is prorogued or adjourned for more than four consecutive days are excluded when calculating those sixty days.