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Paul: according to the Wikipedia page, it's GA-only now -- no scheduled airline service. I don't know how Mexico has sorted out identifiers, since the ICAO Guide gives only the city name, not the airport name.
So is it closed, or what?
This airport handled scheduled airline service into Tuxtla Gutiérrez until May 2006, when it was superceded by Angel Albino Corzo International Airport. The new airport took over the ICAO and IATA identifiers from this airport. If you visited central Chiapas before May 2006, this is the airport you flew into.
This airport opened in May 2006, replacing Francisco Sarabia National Airport for scheduled airline service into Tuxtla Gutiérrez in Chiapas. It took over the ICAO and IATA identifiers from Francisco Sarabia at that time.