California Code, Elections Code - ELEC § 309

“Committee,” as used in Article 1 (commencing with Section 20200) of Chapter 3 of Division 20, means any person or combination of persons who, directly or indirectly, receive contributions or make expenditures or contributions for the purpose of influencing or attempting to influence the action of voters for or against the nomination or election of one or more candidates, or the passage, or defeat of any measure, and who is required to file campaign reports or statements under Chapter 4 (commencing with Section 84100) of Title 9 of the Government Code.