Originally Posted by
EasternATC
FAAH 7110.65U, para. 4-2-5 b. When route or altitude in a previously issued
clearance is amended, restate all applicable altitude restrictions.
In your example, the new controller's instructions erased the previous clearance. If he needed you at ABC at FL180 and DEF at 14000, he should have stated both altitudes.
Thanks for the reference too.