5 C.F.R. § 2635.705
Example 1 to paragraph (a): A disability claims examiner of the Social Security Administration may use official time to engage in certain representational activities on behalf of the employee union of which they are a member. Under 5 U.S.C. 7131 , this is a proper use of official time even though it does not involve performance of assigned duties as a disability claims examiner.
Example 2 to paragraph (a): A pharmacist employed by the Department of Veterans Affairs has been granted an excused absence to participate as a speaker in a conference on drug abuse sponsored by the professional association to which they belong. Even if an excused absence granted by an agency in accordance with Governmentwide personnel guidance would allow employees to be absent from their official duties without charge to their annual leave accounts, such absence would not be on official time.
Example 1 to paragraph (b): A supervisory employee of the Department of Housing and Urban Development may not ask an assistant to run personal errands for the employee during duty hours. Further, directing or coercing a subordinate to perform such activities during nonduty hours constitutes an improper use of public office for private gain in violation of § 2635.702(a) . However, when an arrangement is entirely voluntary and appropriate compensation is paid, a subordinate may provide services to the superior during nonduty hours. For example, a subordinate who enjoys calligraphy may prepare invitations for an upcoming party that the superior is organizing with friends and family at home on personal time for appropriate compensation. When the compensation is not adequate, however, the arrangement would involve a gift to the superior in violation of the standards in subpart C of this part.
5 C.F.R. §2635.705