Jackson says change in policy will make it easier for him to stay in shape while serving four-game suspension.
Redskins safety was suspended a year ago and is eligible for reinstatement beginning today.
Coach Mike Shanahan says he already has spoken to the two players about staying in shape and returning to the team ready to contribute.
Team could use help at safety, especially after Phillip Thomas's injury. But Jackson is not eligible to be reinstated before Aug. 31 at the soonest and he missed all of last season, offseason practices and training camp.
Training camp rolls on, and the Redskins soon will face their first opponent of the preseason.
Above all, quarterback Robert Griffin III seems to be making progress in his return.
Defensive lineman, the third Redskins player suspended or with one looming, had been expected to play a key role with Adam Carriker injured.
Redskins linebacker Rob Jackson said he was frustrated by the situation that led to him receiving a four-game suspension to start the 2013 season.
Suspended safety's one-year deal rolls over into the 2013 season, but he still must be reinstated by the NFL to be eligible to play.
Washington Redskins offensive linemen have taken to Twitter to defend suspended teammate Jordan Black.