It is actually DRVSM (Domestic Reduced Virtical Seperation Minimums. My ZBW/KBDR FEED has ZBW 127.575 High Altitude on it and I will bring up the archive when I'm awake tomorrow morning.
All aircraft for flights between FL290-FL410 should be filing with a suffix of /Q (Slant Quebec) and all altitudes between there must have RVSM approved a/c and pilots.
Westbound - Even
Eastbound - Odd
E-mail @ Flyinguy1120@aol.com
for any questions.