5 C.F.R. § 4701.102
(a) Definitions. For purposes of this section:
(3) Definition of outside employment. For purposes of this section, outside employment means any form of non-Federal employment, business relationship or activity involving the provision of personal services, whether or not for compensation. It includes, but is not limited to, services as an officer, director, agent, advisor, attorney, consultant, contractor, general partner, trustee, teacher, speaker, writer, or any other services provided by an individual. It includes writing when done under an arrangement with another person for production or publication of the written product. The definition does not include participation in the activities of a nonprofit charitable, religious, professional, social, fraternal, educational, recreational, public service or civic organization, unless:
(4) Related to the employee's official duties means that the outside employment meets one or more of the tests described in 5 CFR 2635.807(a)(2)(i)(B) through (E). Outside employment related to the employee's official duties includes:
(b) Prior approval requirement. An employee of the Commission, including a member of a Commissioner's staff, but not a member of the Commission or a special Government employee, shall obtain written approval from the Designated Agency Ethics Official before engaging in outside employment where the services provided:
(c) Submission of requests for approval.