I've been unable to find much accurate or current information regarding this particular airport on the web. I saw something to the effect that in 2011 SJD was supposed to have become the first US pre-clearance airport in Mexico, but no airports in Mexico are included in the Homeland Security's list of pre-clearance airports so I am presuming that never happened. Also I'm looking for information as to the shopping establishments and eating/drinking establishments that are airside and landside at SJD but so far everything I've found is incomplete, out of date, or both.