NFL Collective Bargaining Agreement
Salary Cap Accounting Rules
Section 8(c)Renegotiations and Extensions
(c)
Any agreement to compensate a player at the minimum amount set forth in Article 21 for participation in an offseason workout program or classroom instruction shall not be treated as a renegotiation of a Player Contract. Any agreement to compensate a player for such participation above such amount shall be treated as a renegotiation. All such agreements shall be set forth in writing and promptly filed with the League Office.