29 CFR 102.112 : Labor (§ 0.735-1 To Parts 4908-4999) — (§ 100.101 To Parts 472-499) — Regulations Relating To Labor (§ 100.101 To Parts 472-499) — National Labor Relations Board (§ 100.101 To Parts 105-199) — Rules And Regulations, Series 8 (§ 102.1 To Appendix A To Part 102) — Service And Filing Of Papers (§ 102.111 To § 102.114) — Date of service; date of filing.

The date of service shall be the day when the matter served is deposited in the United States mail, or is deposited with a private delivery service that will provide a record showing the date the document was tendered to the delivery service, or is delivered in person, as the case may be. Where service is made by electronic mail, the date of service shall be the date on which the message is sent. Where service is made by facsimile transmission, the date of service shall be the date on which transmission is received. The date of filing shall be the day when the matter is required to be received by the Board as provided by § 102.111.