The Sn2 Free-mo Standard (draft form) is available here: https://sn2trains.com/free-mo/sn2-free-mo-standard/
The above link is a draft, as the standard is being transferred from narrowtracks.com to sn2trains.com. As part of the transition, the standard is being reformated.
More on Sn2 Free-mo and the original standard will be available at narrowtracks.com until Sn2trains.com is fully enabled.
The original Sn2 free-mo pages have not yet been migrated from http://www.narrowtracks.com/Sn2/Free-Mo/index.htm
The original Sn2 Free-mo standard can be found at the URL above or directly through: http://www.narrowtracks.com/Sn2/Free-Mo/Sn2Free-Mo_StandardsAndGuildeLines.pdf
The pages should be fully migrated by end of 2011.