Modifies provisions relating to campaign finance

HB 1904 replaces two existing campaign finance law sections with three new ones to clarify definitions and reporting rules. It defines key terms like "candidate" (including when someone is deemed to seek office through contributions, expenditures, or announcements) and "committee," and establishes a process for individuals to disavow candidacy by filing a statement within five days (or one day if an election is imminent). The bill also specifies what constitutes "cash" and "check" for reporting purposes. This directly affects candidates, campaign committees, and individuals making political contributions in Missouri.