The Federal Railroad Administration (FRA) published a notice of availability and request for comments on Florida East Coast Railway's (FECR) request for amendment (RFA) to its FRA-approved Positive Train Control Safety Plan (PTCSP). The RFA, submitted June 4 and July 22, 2024, seeks approval to implement I-ETMS Protect 7.0.3.0, which allows the fixed high-speed consist details to be modified in onboard computer configuration files. This change supports Brightline Trains Florida's plan to operate high-speed trains with 2 locomotives and more than 4 passenger cars. This is a procedural regulatory notice, not a NEPA environmental review; no impacts or mitigations are analyzed.12