CFR > Title 29 - Labor > SUBTITLE B—Regulations Relating to Labor > CHAPTER XL—PENSION BENEFIT GUARANTY CORPORATION (parts 4000 to 4907) > SUBCHAPTER A—GENERAL (parts 4000 to 4003) > PART 4000—FILING, ISSUANCE, COMPUTATION OF TIME, AND RECORD RETENTION > SUBPART C—Determining Filing and Issuance Dates (§4000.21 to §4000.32) > 4000.25—What if I use the postal service of a foreign country?