Yes, it is related to anti defection.

 Anti defection : 

History:

Article 70 was written as a result of the Bangladesh Constituent Assembly (Cessation of Membership) Order 1972, promulgated by President Justice Abu Sayeed Chowdhury. The president acted on the advice of Prime Minister Sheikh Mujibur Rahman. The prime minister was upset when a lawmaker from his own party, K. M. Obaidur Rahman, raised a question in the Constituent Assembly of Bangladesh, as to why the assembly had no law making powers. Under the interim constitution in 1972, law making powers resided with the executive branch.

Meaning :

A person elected as a member of Parliament at an election at which he was nominated as a candidate by a political party shall vacate his seat if he –

(a) resigns from that party ; or

(b) votes in Parliament against that party ;

but shall not thereby be disqualified for subsequent election as a member of Parliament.