The 2019 NFL league year doesn’t start until March 13th at 3:00 p.m. CT, but teams can begin negotiations on March 11th at 11:00am CT.

The NFL’s legal tampering period begins on Monday. The legal tampering period is essentially a two-day window, during which agents can begin communicating and negotiating with teams interested in their respective client. This happens ahead of the open of free agency, which is also on March 13th at 3:00pm CT. It plays a large part in where some big named free agents will end up.

There’s a ton of different rules from the NFL surrounding what legal tampering entails. Here’s a look at the things you can do and what you can’t do.

What you can do:

Only applicable to unrestricted free agents, and not restricted free agents or exclusive rights free agents.

Negotiate “all aspects of an NFL player contract” with a players representation.

What you can’t do:

Teams cannot talk to restricted free agents during this two-day period.

Teams can not negotiate directly with players, even if they act as their own representation.

Contracts cannot be executed or agreed to in principal during the legal tampering window.

Players cannot take team visits during this period or make travel arrangements for visits.

Contract announcement cannot be made by teams until the new league year begins.

Tampering violations can result in steep consequences, including the loss of draft picks, and fines from the NFL. Chiefs fans are familiar with these harsh consequences. The league came down hard on the Chiefs for tampering with free agent wide receiver Jeremy Maclin.

The Chiefs have 15 players scheduled to become free agents on the 13th of March. Here’s a quick gallery list of those players:

Gallery Full list of Kansas City Chiefs' 2019 free agents View 22 photos

Following the signing of Carlos Hyde and the release of Justin Houston, the Chiefs have around $22.4 million in cap space according to Spotrac. They’re not expected to work to retain many of their own free agents, if any of them at all. Though Andy Reid left the door open for the return of Demetrius Harris during his press conference at the 2019 NFL combine.

During the legal tampering period the Chiefs would be wise to do their diligence on a loaded class of secondary players. These are some of the best players available for the Chiefs in free agency. They also would be wise to take a look at a few different bridge options for as they’ll be pressed to replace players lost in free agency.