It is a directive issued by political parties to ensure members attend and vote as per the party line.

• It is based on the conventions of the parliamentary government.

Appointment of Whip

• Parties appoint senior members as Whip, to issue directions and ensure compliance in the House.

Types of Whip

• One Line Whip: Usually issued to inform party members of a vote, and allows them to abstain.
• Two-Line Whip: Directs members to be present for voting.
• Three line Whip:  Mandates members to strictly follow the party line on important occasions, such as a no-confidence motion, etc.

Legal Backing

• The Anti-defection law allows the Speaker/ Chairperson to disqualify a member if he/she votes or abstains from voting in such House contrary to any direction issued by the political party.

Source: The Hindu