This photo is relatable with Floor crossing or anti defection law.

According to article 70 of Bangladesh constitution, a member of parliament has no power to vote against his party. If he or she vote against party  he or she will lose his or her seat in the parliament. This article is known as Anti - defecation law or anti floor crossing law.

Positive affect of Article 70 of Bangladesh constitution : 

1. Political stability : A political party needs stability to substain in politics. So,Article 70 work as safeguard for the political party. 

2. Ensure party discipline : Political party always needs discipline to create positive impact.