The reality is a carrier is forced to sign a carrier packet/rate con agreeing to a different term than what the law allows..
(d) Carriers may establish different credit periods in tariff rules. Carriers may publish tariff rules establishing credit periods different from those in paragraph (c) of this section. Such credit periods shall not be longer than 30 calendar days.
And once again I'll fall back on my argument that that the 30 day clock won't start until the paperwork and invoice received. If a broker and shipper has an agreement that the broker will get the paperwork filed withing X number of days, the deadline to pay won't begin until the shipper receives that paperwork.
(b) When the credit period begins. The credit period shall begin on the day following presentation of the freight bill.
It may take the broker several weeks to file their paperwork, like I said, depending on how that office's accounting system works. LDI paid within 21 days, at the latest. The office I work at now pays in 25. If the broker wants the carrier to snail mail the original BOL or POD, then that "presentation" date would be the day that the mail is delivered, and your clock would start the following day.
I've had carriers that don't get BOLs sent for 2 weeks. The fact remains that if you don't like what's in the contract, don't sign it. Or find a load with another broker.