My bad, there are two tests. One is a substance abuse test, which unless you tested positive previously, only happens during a 4 month period in the off-season. This is for stuff like marijuana, cocaine, etc.
The PED/steroid testing goes year round, so its obvious they are more concerned with that and basically
"encourage" nod, nod, wink, wink the use of MJ during the season...
http://www.nj.com/jets/index.ssf/20...for_recreational_drugs_during_the_season.html