Section 500.220 - Service of determinations and computation of time(a) Service of determinations to suspend, revoke, refuse to issue, or refuse to renew a certificate of registration or to assess a civil money penalty shall be made by personal service to the individual, officer of a corporation, or attorney of record or by mailing the determination to the last known address of the individual, officer, or attorney. If done by certified mail, service is complete upon mailing. If done by regular mail or in person, service is complete upon receipt by the addressee or the addressee's representative;(b) Time will be computed beginning with the day following the action and includes the last day of the period unless it is a Saturday, Sunday, or Federally observed holiday, in which case the time period includes the next business day; and(c) When a request for hearing is filed by mail, five (5) days shall be added to the prescribed period during which the party has the right to request a hearing on the determination.54 FR 13329, Mar. 31, 1989