The dataset contains descriptions for each column of historical campaign finance data available on data.sfgov.org or the Excel exports on the Ethics Commission's Campaign Finance Database at http://nf4.netfile.com/pub2?aid=sfoPlease note -- the column header names on different schedules of Form 460 often match, but sometimes have different meanings.

San Francisco Campaign and Governmental Conduct Code ("S.F. C&GC Code") sections 1.143(c), 1.152(a)(3), 1.161(b), 1.161.5, and 1.160.5 require persons who make any independent expenditure, electioneering communication, or member communication that clearly identifies a candidate for City elective office or who authorizes, administers or pays for a persuasion poll to file disclosure statements with the Ethics Commission. For detailed instructions, please see Third Party Disclosure Form Regarding Candidates.

According to its records, the Ethics Commission has identified the campaign finance disclosure filers in this table as non-responsive (NR) filers. NR filers are those that have not responded to two or more written notices and one or more verbal notices regarding past-due reporting. Please note that Ethics Commission records are subject to change and the table below may not include all NR filers or reflect recent activity. The NR filers are encouraged to contact the Commission because continued failure to file may result in an enforcement action. Posted NR filers are removed from the list after filing their past-due campaign statement(s) or five years have elapsed since the applicable filing deadline.

In 1997, San Francisco voters approved the Regulation of Campaign Consultants Ordinance (“Ordinance”). The Ordinance requires persons who earn $1,000 or more per year for campaign consultant services to register with the Ethics Commission and file quarterly activity reports. The Ordinance defines “campaign consultant” as a person or entity that receives or is promised $1,000 or more in a calendar year for either campaign management or campaign strategy.

Chart of third party spending 2011 to support or oppose candidates for Mayor.

San Francisco Campaign and Governmental Conduct Code ("S.F. C&GC Code") sections 1.143(c), 1.152(a)(3), 1.161(b), 1.161.5, and 1.160.5 require persons who make any independent expenditure, electioneering communication, or member communication that clearly identifies a candidate for City elective office or who authorizes, administers or pays for a persuasion poll to file disclosure statements with the Ethics Commission. For detailed instructions, please see Third Party Disclosure Form Regarding Candidates.