This here's the current Speed Demos Archive (speeddemosarchive.com) fastest run for this category:
Metal Gear Solid 2: Sons of Liberty
Tanker episode only
Collect all dog tags
"Big Boss" rules - no Alerts, Rations, Kills, Continues or Radar
Clear time is 18 min 15 sec.
You can find detailed information on the run at the MGS2 page on SDA:
SDA currently doesn't distinguish between different versions of MGS2. The US version of Sons of Liberty has a different dog tag layout to other versions of the game. This run is of the European SoL, which has the same tag layout as the Japanese SoL and all versions of Substance. I don't have any idea which layout is the quicker one, though it's likely the US SoL layout as it has less tags.
Click my video response for Part 2.