NFL Collective Bargaining Agreement

Article 14
Enforcement of the Salary Cap and Rookie Compensation Pool

Section 1
Undisclosed Terms

A Club (or a Club Affiliate) and a player (or a Player Affiliate or player agent) may not, at any time, enter into undisclosed agreements of any kind, express or implied, oral or written, or promises, undertakings, representations, commitments, inducements, assurances of intent, or understandings of any kind (a) involving consideration of any kind to be paid, furnished or made available or guaranteed to the player, or Player Affiliate, by the Club or Club Affiliate either prior to, during, or after the term of the Player Contract; and/or (b) concerning the terms of any renegotiation and/or extension of any Player Contract by a player subject to a Franchise Player or Transition Player designation.