From Silex Unwired: "All new certifications and permissive changes must be approved under the new 15.407 rules after June 2nd, 2015. For products certified under 15.247, 5 GHz band cannot be sold unless they are re-tested and re-certified under 15.407 rules after June 2nd 2016."
Basically, all equipment manufactuered on/after June 2016 will need to be re-tested/re-certified and will need to adhear to the new rules. Equipment manufacturered prior to that date is grandfathered UNLESS it's re-certified e.g. a manufactuer decides to add new channel widths, which I believe requires re-testing and thus the firmware update to that grandfathered radio would need to follow the new rules.
Cambium also has a post on this as well.