The Anti-Bribery Improvement Act modifies federal bribery laws by expanding what conduct is prohibited when offering bribes to public officials and witnesses. Specifically, the bill adds "access" as a new prohibited form of bribery, defining access as a public official's ability to influence decisions or actions on matters that may come before them in their official capacity. The legislation makes it illegal to offer bribes to induce officials to provide such access or to make explicit promises or undertakings to provide access. The bill affects federal prosecutors, law enforcement, and any individuals or entities attempting to unlawfully influence public officials. The legislation does not specify new funding amounts or implementation timelines beyond its introduction in September 2026.