This is an analytical paper. In other words, your paper should be devoted to defending your conclusion using logic and evidence. It should use only credible sources, and it should back up its assertions with facts taken from credible sources. It should also consider both sides of the issue.
This is a research paper. That means that you should conduct research to find relevant information to support your conclusion. Although I am interested in your opinion, you must be able to support that opinion with facts and figures, and evidence. You will obtain these facts and figures and evidence from your research.
This is a paper about government. Although your paper should certainly address the issue of whether the proposal is a good idea (would it work?), it should also address issues such as its constitutionality, its effect on federalism, its effect on separation of powers (if any), etc.
All applicants go through a series of tests that check their level of English and knowledge of formatting styles. The applicant is also required to present a sample of writing to the Evaluation Department. If you wish to find out more about the procedure, check out the whole process.