5 C.F.R. § 2640.204
None of the exemptions set forth in §§ 2640.201 , 2640.202 , or 2640.203 apply to any financial interest held or acquired by an employee, his spouse, or minor child in violation of a statute or agency supplemental regulation issued in accordance with 5 CFR 2635.105 , or that is otherwise prohibited under 5 CFR 2635.403(b) .
Example 1 to § 2640.204 : The Office of the Comptroller of the Currency (OCC), in a regulation that supplements part 2635 of this chapter, prohibits certain employees from owning stock in commercial banks. If an OCC employee purchases stock valued at $2,000 in contravention of the regulation, the exemption at § 2640.202(a) for interests arising from the ownership of no more than $15,000 worth of publicly traded stock will not apply to the employee's participation in matters affecting the bank.
5 C.F.R. §2640.204