(a) General rule. In computing any time period prescribed by this part, by order of the Director or a hearing officer, or by any applicable statute, exclude the day of the event that triggers the period, count every day, including intermediate Saturdays, Sundays, and Federal holidays, and include the last day of the period unless it is a Saturday, Sunday, or Federal holiday as set forth in 5 U.S.C. 6103(a). When the last day is a Saturday, Sunday, or Federal holiday, the period runs until the end of the next day that is not a Saturday, Sunday, or Federal holiday.

(b) When papers are deemed to be filed or served. Filing and service are deemed to be effective:

(1) In the case of personal service or same day commercial courier delivery, upon actual receipt by person served;

(2) In the case of overnight commercial delivery service, Express Mail delivery, First Class Mail, Registered Mail, or Certified Mail, upon deposit in or delivery to an appropriate point of collection; or

(3) In the case of electronic transmission, upon transmission.

(c) Calculation of time for service and filing of responsive papers. Whenever a time limit is measured by a prescribed period from the service of any notice or paper, the applicable time limits are calculated as follows:

(1) If service is made by First Class Mail, Registered Mail, or Certified Mail, add three calendar days to the prescribed period;

(2) If service is made by Express Mail or overnight delivery service, add one calendar day to the prescribed period; or

(3) If service is made by electronic transmission, add one calendar day to the prescribed period.