A rule change is a form, not a software release
Axle limits, gross limits, where the bridge formula applies, and shape rules such as California's 40 ft kingpin-to-rear-axle are all held as records that can be edited. Someone who does not write software can change them.
Why this is different
When limits are written into the software itself, a legislature's change turns into a ticket, a release and a rollout. In the meantime the yard runs off a printed table taped inside a cupboard door, and nobody is sure when it was printed.
The change is one record, edited that morning, and every load planned from then on is judged against the new number. The alternative is a memo that some planners read, a reprinted table that reaches four of the five yards, and a fortnight of loads planned to a limit that no longer exists.

