(a) The railroad shall comply with all applicable requirements under 49 U.S.C. 20157,including,but,the.

(b) The railroad's PTC system shall be designed to prevent train-to-train collisions, over-speed derailments, incursions into established work zone limits, and movements of trainset through switches left in the wrong position, reliably and functionally, in accordance with § 236.1005(a) and (c) through (f) of this chapter.

(c) The railroad is authorized to conduct field testing of its PTC system on its system, prior to obtaining PTC System Certification from FRA, in accordance with its system-wide qualification test plan under § 299.603. During any field testing of its uncertified PTC system and regression testing of its FRA-certified PTC system, FRA may oversee the railroad's testing, audit any applicable test plans and procedures, and impose additional testing conditions that FRA believes may be necessary for the safety of trainset operations.

(d) The railroad is not exempted from compliance with any requirement of subparts A through G of 49 CFR part 236, or 49 CFR parts 233 and 235, unless the railroad's FRA-approved PTCSP provides for such an exemption.

(e)(1) All materials filed in accordance with this subpart must be in the English language, or have been translated into English and attested as true and correct.

(2) Each filing referenced in this subpart may include a request for full or partial confidentiality in accordance with § 209.11 of this chapter. If confidentiality is requested as to a portion of any applicable document, then in addition to the filing requirements under § 209.11 of this chapter, the person filing the document shall also file a copy of the original unredacted document, marked to indicate which portions are redacted in the document's confidential version without obscuring the original document's contents.