The powers of the three bodies, the executive, legislative and judiciary do not overlap and each has its own role.

The separation of powers is an approach to governing a state. Under it, a state's government is divided into branches, each with separate, independent powers and responsibilities so that the powers of one branch are not in conflict with those of the other branches. The typical division is into three branches: a legislature, an executive, and a judiciary, which is the trias politica model. It can be contrasted with the fusion of powers in parliamentary and semi-presidential systems, where the executive and legislative branches overlap.

The intention behind a system of separated powers is to prevent the concentration of power by providing for checks and balances. The separation of powers model is often imprecisely and metonymically used interchangeably with the trias politica principle. While the trias politica model is a common type of separation, there are governments that have greater or fewer than three branches, as mentioned later in the article.