Members of a house are bound by the ‘whip’, and must follow the whip as observed by the Supreme Court
About Whip:
In parliamentary jargon, a whip is a written directive requiring party members to be present for crucial votes or to vote a certain way only.
The phrase comes from the traditional British method of "whipping in" legislators to toe the party line.
To issue whips, parties designate a senior member from among their Parliamentary delegations. This member is called a chief whip, and he/ she is assisted by additional whips.
In India, all parties can issue whips to their members.
Role of a whip:
They try to ensure that their fellow political party legislators attend voting sessions and vote according to their party’s official policy.
Limitations of whip:
There are some cases such as Presidential elections where whips cannot direct a Member of Parliament (MP) or Member of Legislative Assembly (MLA) to vote in a particular fashion.
Violations of whips:
The consequence for ignoring a whip differs depending on the nation. In the UK, an MP who disobeys the whip can be expelled from the party but still retain their House seat as an Independent.
IN case of India, The anti-defection law allows the Speaker/ Chairperson to disqualify such a member who has gone against the whip.
The sole exceptionis when a directive is opposed by more than a third of lawmakers, essentially dividing the party.