An incidental committee must file a C-8 report at registration. It must file another C-8 report on the tenth day of each month, if during the preceding month, it:
  • received a payment that would change its top 10 list on the last C-8, or
  • made a contribution to a candidate or political committee of more than $200.
An incidental committee also must file a C-8 report, regardless of activity, on:
  • the 21st and 7th days before an election in which it is participating, and 
  • the 10th day of the first month after the election. RCW 42.17A.235