Requiring a demonstration of support before a legislative bill is filed.

HB 2591 requires legislative sponsors to gather at least 1,000 signatures from registered Washington voters supporting a bill before it can be filed with the office of the code reviser. This applies to all bills, resolutions, or memorials introduced by state legislators, directly affecting those who propose new legislation. The key mechanism mandates this signature threshold to ensure proposed bills have a minimum level of public support before entering the legislative process. The bill also establishes civil penalties of up to $10,000 for violations of related anti-influence provisions, including a citizen lawsuit option for alleged "trading in special influence." This procedural requirement aims to reduce duplicative filings and enhance transparency in the legislative workflow.