26 U.S.C. § 6720C

1. (a)Except in the case of a failure described in subsection (b) or (c), any person required to notify a group health plan under section 9501(a)(2)(B) of the American Rescue Plan Act of 2021 who fails to make such a notification at such time and in such manner as the Secretary of Labor may require shall pay a penalty of $250 for each such failure.
2. (b)In the case of any such failure that is fraudulent, such person shall pay a penalty equal to the greater of—
   1. (1)$250, or
   2. (2)110 percent of the premium assistance provided under section 9501(a)(1)(A) of the American Rescue Plan Act of 2021 after termination of eligibility under such section.
3. (c)No penalty shall be imposed under this section with respect to any failure if it is shown that such failure is due to reasonable cause and not to willful neglect.