Nope. Didn't forget any. Under the provision of
49CFR§375.401 of FMCSA's consumer protection regulations for transportation of household goods in interstate commerce there are only two type of estimates required by law.
The guaranteed-not-to-exceed (GNTE) estimate (or one of the other versions uniquely named by participating carriers) is a industry variation of a
binding estimate (49CFR§375.403). Nowhere in the federal regulations are there any provisions that require a licensed carrier to offer or administer a not-to-exceed option.
Despite the fact that there is no legal requirement, most of the top twelve national van lines and many independent movers offer some version of GNTE estimates to customer's looking for price certainty.
Typically the binding estimated cost may be a little higher than an actual weight estimate to allow a margin of error, but the cost will go down if the customer has less weight or requires fewer services.