Employee representatives
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 may select a representative of his or her choice to assist in the preparation and presentation of an appeal. An agency may disallow an employee's representative when the individual's activities as a representative would cause a conflict of interest or position; an employee who cannot be released from his or her official duties because of the priority needs of the Government; or an employee whose release would give rise to unreasonable costs to the Government.
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.