Definition of Candidate Under 18 U.S.C. § 207(j), Memorandum for the Director, Office of Government Ethics [November 6, 2000] [open pdf - 26KB]
"Individuals who otherwise meet the specifications and limitations of § 207(j)(7)(A) and (B) should be deemed to be communicating on behalf of a 'candidate' through the point at which that 'candidate' assumes the office to which he has been elected."
U.S. Dept. of Justice: http://www.justice.gov/