CALP was written after CAD. I believe the first CAD was written in 1991. In my copy there is no mention of a balanced reward meal, only the warning to keep within the hour. I also have an updated version of CAD that does talk about balance in the RM. It also offer 5 different weight loss plans

entry-CM, CM, RM

Plan A-CM, CM, RM, CS (snack)

Plan B-CM, CM, RM

Plan C-CM, CM, RM plus salad

Plan D-CM, RM with salad

I usually follow plan c mostly because I like salad.
There are specific criteria that tell you which one is right for you-let me know if you want that info!