Public participation is viewed as a tool, intended to inform planning, organising or funding of activities. Public participation may also be used to measure attainable objectives, evaluate impact, and identify lessons for future practice. All modern constitutions and fundamental laws contain and declare the concept and principle of popular sovereignty, which essentially means that the people are the ultimate source of public power or government authority. The concept of popular sovereignty holds simply that in a society organized for political action, the will of the people as a whole is the only right standard of political action. It can be regarded as an important element in the system of the checks and balances, and representative democracy. Therefore, the people are implicitly entitled even to directly participate in the process of public policy and law making.