The Representation of the People Act 1950 lays down 

• Procedures for delimitation of constituencies.
• Procedure for the allocation of seats in the House of the People and in the Legislative Assemblies and Legislative Councils of States.
• For the preparation of electoral rolls and the manner of filling seats.
• The qualification of voters.

Further Reading:

• Representation of People Act, 1951
• Indian Polity Notes For UPSC