To distill:
It's LTE if the helicopter is within its operating envelope, a yaw develops, you run out of pedal and can't stop the yaw.
It's LTA if the helicopter is outside of its operating envelope, a yaw develops, you run out of pedal and can't stop the yaw.
??
Perhaps this is why the FAA has elected to roll it all into the moniker "LTE" - while one is design induced and the other is pilot induced, the results are the same, as is recovery (full pedal, reduce power/torque, get airspeed, fly with the yaw).