[5] On 1 May 2022, president Andrés Manuel López Obrador announced an investment of 30 billion pesos for the rehabilitation of the section that goes from the city of Coatzacoalcos, Veracruz, to the city of Palenque, Chiapas, in the southeast of the country.

[7] Passenger service was originally planned to return to the FA Line in March 2024,[8] although by 1 March, the federal government of Mexico was planning on beginning passenger service "in the middle of 2024".

[9] On September 13, 2024, passenger service was reopened on the FA line from Coatzacoalcos to Pakal Ná (Palenque).

The branch would travel through the Huimanguillo, Cárdenas, Cunduacán, Comalcalco, and Paraíso municipalities, ending at the port of Dos Bocas, where it would connect with the Olmeca Refinery [es].

[12] In March 2022, the Secretariat of Finance and Public Credit reported that the new branch would cost 6,054 million pesos.