When: The legal tampering period starts at on Friday night at 11:00 p.m. (Arrowhead Time) and ends at 3:00 p.m. (Arrowhead Time) on Tuesday.
Who: Teams can contact the agents for players but not the players themselves. Players without agents can not negotiate with teams. This applies to unrestricted free agents only. Not restricted free agents or exclusive rights free agents. See the full list of Chiefs free agents here.
What: Teams can not execute contracts with player agents. They can negotiate and set the parameters for a deal, but they can not actually execute the contracts until free agency starts at 3:00 p.m. on Tuesday.
Where: Nowhere. As in, players can not meet with teams until Tuesday. Agents can talk but visits can't happen until Tuesday.
Those are all the big bucket details on the legal tampering period, which kicks off this evening. We'll be talking about the NFL all weekend long, which is exactly what the NFL wants. Prepare for lots of rumors to be coming out as "negotiations" often use the media to further the cause of the agent.