Section 825.300 describes the requirements for covered employers to
post a notice for employees that explains the Act's provisions. If a
representative of the Department of Labor determines that an employer
has committed a willful violation of this posting requirement, and that
the imposition of a civil money penalty for such violation is
appropriate, the representative
may issue and serve a notice of penalty on such employer in person or by
certified mail. Where service by certified mail is not accepted, notice
shall be deemed received on the date of attempted delivery. Where
service is not accepted, the notice may be served by regular mail.