Thank You WDS

[Steel God]

Be aware of the Main Help File note on the Night Movement Fatigue Optional rule.
"Units that are subject to this receive the penalty once every two player turns. If a unit has not performed any of these actions on one side's turn, then in the next two player turns performs actions on both turns it will receive this penalty two turns in a row after which it would not be subject to it for the following turn. Thus the once every two player turns limit is still valid."

To summarize a unit can get Night Movement Fatigue two player turns in a row if it rested a turn and recovered Fatigue.
On the 3rd player turn it will not get any Fatigue regardless of any actions although if any of these actions occur it will not recover FA.  The counter is then reset and on the 4th turn any action will result in Fatigue while resting will allow Fatigue to be recovered.

BOTH PLAYER'S UNITS follow this routine.

The new option eliminates the bug of Player 1 getting FA on the last night turn and adds Fatigue for the listed actions during a player turn.  So if you remain adjacent at night and fire or take loss you will get additional Fatigue as well as not being able to recover any Fatigue.

So what you're saying is if a unit moves the 1st, 3rd, 5th, 7th and 9th turns of Night it will accumulate no fatigue?  That seems a truly odd change.