It is important for a federal state to have a bicameral legislature since it is often adopted by federal states where regional differences or sensitivities require more explicit representation, with the second chamber representing the constituent states the upper houses are closely linked with the federal system as being appointed or elected directly by the governments or legislatures of each State.
Therefore, bicameral legislation ensures proportional representation from various states which may differ demographically, socially, economically and may require a unique way of representation.