Employees who work on an irregular or occasional basis
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
An employee who works on an irregular or occasional basis or is a special Government employee as defined in 18 U.S.C. 202(a) is subject to the provisions of the applicable subpart of this part when he or she is on duty.
Example:An employee appointed to a special commission or task force who does not have a regular tour of duty may run as a partisan political candidate, but may actively campaign only when he or she is not on duty.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.