5 C.F.R. § 734.205
Subject to the prohibitions in § 734.306 , an employee may:
Example 1: An employee of the Environmental Protection Agency may broadcast endorsements for a partisan political candidate via a public address system attached to his or her private automobile.
Example 2: An employee of the Department of Interior may canvass voters by telephone on behalf of a political party or partisan political candidate.
Example 3: An employee of the Department of Agriculture may stand outside of polling places on election day and hand out brochures on behalf of a partisan political candidate or political party.
Example 4: An employee may appear in a television or radio broadcast which endorses a partisan political candidate and is sponsored by the candidate's campaign committee, a political party, or a partisan political group.
Example 5: An independent contractor is not covered by this part and may display a political button while performing the duties for which he or she is contracted.
Example 6: An employee of the Department of Commerce who is on official travel may take annual leave in the morning to give an address at a breakfast for a candidate for partisan political office.
Example 7: An employee may manage the political campaign of a candidate for public office including supervising paid and unpaid campaign workers.
Example 8: While not on duty, a Federal employee may distribute campaign leaflets by hand to homes or parked cars even though the leaflet may contain information concerning where to send contributions among other factual material about a partisan political candidate. However, should a member of the public stop the employee and request further information about contributions, the employee should refer that request to another campaign worker who is not a Federal employee.
Example 9: An employee may place in his or her front yard a sign or banner supporting a partisan political candidate.
5 C.F.R. §734.205