I looked for a little while yesterday and didn't find anything.
Mickey Spagnola said a two week allowance prior to the suspension ending to start practicing is usually given, but there was a lot of back and forth between the Dallas Cowboys and the NFL yesterday before the team was told Randy Gregory could not suit up for practice.
NFL Policy and Program for substances of abuse
There's been plenty of speculation about Randy Gregory missing a test following the 10 game suspension, here's what is said about that.
Per the policy, unless Gregory was deemed to be evading a test, the punishment for the first missed test is a warning or $25K fine. Gregory reportedly left the treatment facility for a weekend and then returned. I've no idea why he left if the report was true, but Gregory returned in short order and resumed his program.
The medical adviser carries a lot of weight in the program.
If that doctor feels Gregory is doing his best to comply with treatment, it will go a long way in his favor.