[Liquid Swords]

I see nothing wrong with a lateral IR to IR move, and I think the period of time spent on IR should transfer too (along with cap and roster year adjustments as described in the IR section of the rules). So, if the player has been on IR for 3 weeks and 1 day, then the team acquiring him in a trade must keep him on IR for 6 more days before becoming active roster eligible. If the 4 week period has passed before the trade, the the team receiving the IR player in the trade can opt to move him laterally to his IR or activate him immediately. My two cents.