"JPH" wrote in message
news:V8xgf.38889$4n5.27102@dukeread01...

FAA 7110.65
3-7-5. PRECISION APPROACH CRITICAL AREA

b. Air carriers commonly conduct "coupled" or "autoland" operations to
satisfy maintenance, training, or reliability program requirements.
Promptly issue an advisory if the critical area will not be protected when
an arriving aircraft advises that a "coupled," "CATIII," "autoland," or
similar type approach will be conducted and the weather is reported
ceiling of 800 feet or more, and the visibility is 2 miles or more.


That can only be done when the tower is open, we're talking about ILS
critical areas when the tower is closed.