There have been a number of minor tweaks/changes over the years since that time, so it's probably overdue for an update, but as always, what budget will that project come out of...That Handbook is basically a friendly / human-readable version of the laws themselves, which are obviously the most up to date, if a little terse.

@Matt Romano I'm sure if you email Steve asking him for a recommendation he'll shoot you back a terse but helpful reply suggesting someone.