An employee shall not engage in outside employment or any other outside activity that conflicts with his official duties. An activity conflicts with an employee's official duties:

If it is prohibited by statute or by an agency supplemental regulation; or

If, under the standards set forth in §§ 2635.402 and 2635.502, it would require the employee's disqualification from matters so central or critical to the performance of his official duties that the employee's ability to perform the duties of his position would be materially impaired.

Employees are cautioned that even though an outside activity may not be prohibited under this section, it may violate other principles or standards set forth in this part or require the employee to disqualify himself from participation in certain particular matters under either subpart D or subpart E of this part.

An employee of the Environmental Protection Agency has just been promoted. His principal duty in his new position is to write regulations relating to the disposal of hazardous waste. The employee may not continue to serve as president of a nonprofit environmental organization that routinely submits comments on such regulations. His service as an officer would require his disqualification from duties critical to the performance of his official duties on a basis so frequent as to materially impair his ability to perform the duties of his position.

An employee of the Occupational Safety and Health Administration who was and is expected again to be instrumental in formulating new OSHA safety standards applicable to manufacturers that use chemical solvents has been offered a consulting contract to provide advice to an affected company in restructuring its manufacturing operations to comply with the OSHA standards. The employee should not enter into the consulting arrangement even though he is not currently working on OSHA standards affecting this industry and his consulting contract can be expected to be completed before he again works on such standards. Even though the consulting arrangement would not be a conflicting activity within the meaning of § 2635.802, it would create an appearance that the employee had used his official position to obtain the compensated outside business opportunity and it would create the further appearance of using his public office for the private gain of the manufacturer.