MO SB543

Requires 501(c)(4) organizations ("covered organizations") that engage in electioneering activities or make political contributions to file annual disclosure reports with the Missouri Ethics Commission by January 31st

Mandates disclosure of all donors who contribute over $1,000 to covered organizations, including names, addresses, and donation amounts

Requires 48-hour electronic disclosure reports when covered organizations exceed $5,000 in electioneering expenditures or political contributions, including donor information for those giving over $5,000 in the previous 12 months

Defines "electioneering activities" to include covered communications that influence voters on candidates or ballot measures, including communications within 45 days of a primary or 90 days of a general election that identify candidates or measures

Effective date of January 1, 2016, with penalties for non-compliance assessed against board of directors per existing ethics commission fee provisions in section 105.963