Rapier Rules across the SCA
The current SCA Corporate Rules can be found here.
And for historical comparison purposes, the original SCA rapier rules can be found here.
Ansteorra This links to the Earl Marshal's page. Click on "Forms and Handbooks," then scroll down to "Ansteorra Rapier Addendum - 2012" to get the current rules.
Artemisia This links to the Kingdom Library page. Scroll down to the "Handbooks" section, then click on the Rapier Standards Handbook to get their current rules.
Last updated November 30, AS 50 (2015)
(I try to check these links every few months, but I'm only human. If you notice that a link is out of date, please let me know.)