I can give you an example as it relates to the building code. At one point the highest and best standard for elevators was to have Braille on the buttons. Since then, it's Braille, and the audio announces floors.
In an evolving environment around universal design, with input from people's lived experience, standards elevate—if I can use the elevator analogy again—and as they elevate, they're saying if the newest, highest and best standard has two dimensions as opposed to a single dimension, that prevails.
The standard that constitutes accessibility in accommodation migrates to the highest possible standard at all times, and that's the goal of the legislation. Instead of having to constantly revisit the standards and constantly detail the standards piece by piece and change by change, when a new benchmark is achieved, that is the new benchmark—