{"data":{"id":"us/39-cfr-958.20","jurisdiction":"us","citation":"39 CFR 958.20","heading":"Service.","body":"If both parties are participating in the electronic filing system, separate service upon the opposing party is not required. Otherwise, documents shall be served personally or by mail on the opposing party, noting on the document filed, or on the transmitting letter, that a copy has been so furnished.","path":["Title 39—Postal Service","CHAPTER I—UNITED STATES POSTAL SERVICE","SUBCHAPTER N—PROCEDURES","PART 958—HAZARDOUS MATERIALS"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-39.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:51Z","sha256":"3afa0a95804a1621d08319cb7eabffdd97efe58f3e27d4301241a040081b5ff9","source_id":"us-cfr","stale":true,"prev":"us/39-cfr-958.19","next":"us/39-cfr-958.21"},"notice":"GroundRules: Original legal text. Not legal advice."}