(a) If a rail transit agency determines, or is notified by the department, that the safety program plan needs to be modified, the rail transit agency shall submit the modified plan and any subsequently modified procedures to the department for review and approval.     
      (b) Except as provided by subsection (c) of this section, the rail transit agency may not implement the proposed modifications before the modified plan is approved by the department.     
      (c) If the rail transit agency determines that a modification is necessary to address an imminent safety hazard, the rail transit agency may make a temporary modification to its system safety program plan before that modification is approved by the department, but the modification must be approved by the department before it may become permanent.     
     Source Note:        The provisions of this §7.86 adopted to be effective February 19, 2020, 45 TexReg 1041