Earlier quoted context omitted.
Aviation industry can introduce new regulation fast. One example would be reinforced cockpit doors. Prompted by events in September 2001, new standards published four months later (January 2002), expected to be completed fifteen months after that (April 2003). https://avalon.law.yale.edu/sept11/faa_001.asp
It makes sense for a change about doors. Doors are old as time. Everyone understands how doors work. The impact of a door change is straightforward. There are relatively few moving parts involved in a self contained door (figuratively and literally).
https://www.faa.gov/newsroom/out-front-airline-safety-two-de...