49 CFR § 190.11 - Availability of informal guidance and interpretive assistance.

---
identifier: "/us/cfr/t49/s190.11"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 190.11 - Availability of informal guidance and interpretive assistance."
title_number: 49
title_name: "Transportation"
section_number: "190.11"
section_name: "Availability of informal guidance and interpretive assistance."
chapter_name: "PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "D"
subchapter_name: "PIPELINE SAFETY"
part_number: "190"
part_name: "PIPELINE SAFETY ENFORCEMENT AND REGULATORY PROCEDURES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "33 U.S.C. 1321(b); 49 U.S.C. 60101"
regulatory_source: "45 FR 20413, Mar. 27, 1980, unless otherwise noted."
cfr_part: "190"
---


# 190.11 Availability of informal guidance and interpretive assistance.

(a) *Availability of telephonic and Internet assistance.* PHMSA has established a Web site and a telephone line to OPS headquarters where information on and advice about compliance with the pipeline safety regulations specified in 49 CFR parts 190-199 is available. The Web site and telephone line are staffed by personnel from PHMSA's OPS from 9:00 a.m. through 5:00 p.m., Eastern Time, Monday through Friday, with the exception of Federal holidays. When the lines are not staffed, individuals may leave a recorded voicemail message or post a message on the OPS Web site. The telephone number for the OPS information line is (202) 366-4595 and the OPS Web site can be accessed via the Internet at *http://phmsa.dot.gov/pipeline.*

(b) *Availability of written interpretations.* A written regulatory interpretation, response to a question, or an opinion concerning a pipeline safety issue may be obtained by submitting a written request to the Office of Pipeline Safety (PHP-30), PHMSA, U.S. Department of Transportation, 1200 New Jersey Avenue SE., Washington, DC 20590-0001. The requestor must include his or her return address and should also include a daytime telephone number. Written requests should be submitted at least 120 days before the time the requestor needs a response.

[Amdt. 190-16, 78 FR 58909, Sept. 25, 2013]