A quick public service announcement…
Useful information is available on the Bicycle Racing Association of Colorado (BRAC) website regarding membership in 2013. BRAC will send a small sticker for racing participants to affix to their USA Cycling racing license, rather than issue a membership card. As well, it appears that the BRAC license # is also a thing of the past. The USA Cycling member # is now the go to identifier. 
Second, the approach for timing chips at race events is also modified for the 2013 season.
Related links below:
http://www.coloradocycling.org/articles/brac-timing-system-changes-2013-please-read