Which of the following is a requirement before a bill may become law?

Before a bill can become law, it is essential that it be referred to a committee and printed for legislators. This step is crucial because it allows for thorough examination and discussion of the bill's content. Committees play a vital role in the legislative process by reviewing, amending, and making recommendations on proposed legislation. Additionally, printing the bill ensures that all legislators have access to the details of the proposal, allowing for informed voting and debate.

The other options do not accurately reflect the fundamental requirements of the legislative process in Wyoming. For instance, while multiple votes may occur, it is not a stringent requirement for passage that a bill must be voted on multiple times. Similarly, not every bill requires public referendum, as this is applicable mainly to specific types of legislation. Additionally, requiring a bill to be signed by all legislators is not feasible, as legislative approval typically requires a majority, not unanimity. Thus, the correct process clearly delineates the vital role of committees and printing as foundational steps toward a bill becoming law.