Per 49 CFR 383.123(b), a knowledge and skills test administered and FMCSA-approved before September 30, 2002 has what effect on the current S-endorsement requirements?

49 CFR 383.123(b)

This is a historical/legacy provision rather than something a new driver will personally use, but it shows up as a distractor on practice tests — recognizing it as a narrow grandfather clause (not a general exemption) prevents answering based on a half-remembered rule.