"Social policy may be defined as any formal government enactment that affects the well-being of people, including laws, regulations, executive orders, and court decisions."
Source: Mizrahi, T., & Davis, L. (2008). Encyclopedia of social work (20th ed.). NASW Press.
For the Policy Analysis Paper, it's easiest to focus on legislation (a bill = a proposed law). Talk with your professor if you'd like to focus on a different policy type such as a federal agency regulation or international agreement.
If selecting state-level legislation, focus only on the state where you are registered to vote.