The key features of the 2011 CBA included changes related to health and safety, including a reduction in the number of off-season practices, a prohibition against training camp “
two-a days", and a limit on contact practices in both the preseason and regular season. The new CBA also featured increases in player benefits, including retroactive pension increases for retired players and the creation of a neuro-cognitive benefit for players affected by concussions and other similar injuries. Also, the agreement promised an increase up to $1.5 million in salary guarantees for injured players and a new revenue split, offering players between 47 percent and 48.5 percent of all revenue. Changes were also made in contract-related benefits, with an increase in minimum player salaries[19] and salary cap minimums, including the guarantee of a 99% -95% league wide spend and a requirement that each club would have to spend an average of 89% of the salary cap over four-year periods.
A new rookie salary system was implemented by the NFL to limit spending on first-round draft picks, but the savings were reallocated to veteran players. The 2011 CBA had no opt-out clause and a ten-year term set to expire after the 2020 season.
https://en.wikipedia.org/wiki/NFL_Collective_Bargaining_Agreement
Unless Owners present changes to the CBA which I don't see happening, the current rules in place will continue until 2020 at which point the NFLPA should make this a priority
