Here is the update from the NFL annual meeting in regards to the rule changes for 2019. This was provided courtesy of the NFL communications department.
Approved 2019 Playing Rules from NFL Annual Meeting – Morning Session
The below playing rules were adopted by NFL clubs so far today at the NFL meetings in Phoenix, Arizona.
Approved 2019 Playing Rules Summary
1. By Competition Committee; Makes permanent the kickoff rule changes that were implemented during the 2018 season.
2. By Competition Committee; Expands protection to a defenseless player.