<<<<FAA authorization is:
"B. MEL Effectivity
The provisions and limitations of the MEL are applicable for “Dispatch” of an aircraft. For MEL purposes, “Dispatch” is defined as the advancement of throttles for the purpose of taking off (takeoff event). If the takeoff is aborted for any reason, the MEL provisions and limitations become applicable once again.
If a component or function becomes inoperative following the takeoff, the MEL does not apply.">>>>
As regards a flight dispatched under FAA regulations, absolutely correct.
Applies to CDL as well.
Further, normally the MEL item is placarded in the aircraft by ground maintenance prior to taxi, but if the u/s item requiring application of the MEL, and the aircraft has already taxied for departure, it need not return for any further action (placarding), but the crew nonetheless must apply said MEL procedures.
FAA....making for a much smoother and cost-effective operation, while retaining safety of flight..