Question:
The Allied player aims to execute some overrun in the exploitation phase after an amphibious landing, using a transport counter. Rule 14J requires the units to be stacked with the counter at the start of the phase, while the counter can disembark from the LC not before the start of the naval subphase of the exploitation phase. Does this mean that the allied player cannot use the counter to motorize the units already on the beach (those that executed the amphibious landing)?

Answer:
Correct. If the transport counter is on the LCs and the unit is on the beaches, they are not really stacked together and the transport counter may NOT motorize that unit. []

Source:
TEM 59/60