Air carrier captain self reported not following the latest update regarding face mask policy.

Attributes
ACN	1755316
Time
Date	202008
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Parked
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 70 Flight Crew Type 9000
Events
Anomaly	Deviation - Procedural Published Material / Policy Flight Deck / Cabin / Aircraft Event Other / Unknown

Narrative:

I removed my mask/facial covering upon boarding an empty aircraft and stowed my personal belongings in the cockpit. The B flight attendant asked why I wasn't wearing a mask in the cabin. (Again; the aircraft was empty; except for the six-person crew.) I stated it was not required when not in view of customers. She said it was. I checked my manual updates and sure enough she was correct. I notified the flight attendant that I had seen the [update]. Flight departed on time and landed safely in ZZZ.

Original NASA ASRS Text

Title: Air carrier Captain self reported not following the latest update regarding face mask policy.

Narrative: I removed my mask/facial covering upon boarding an empty aircraft and stowed my personal belongings in the cockpit. The B Flight Attendant asked why I wasn't wearing a mask in the cabin. (Again; the aircraft was empty; except for the six-person crew.) I stated it was not required when not in view of customers. She said it was. I checked my manual updates and sure enough she was correct. I notified the Flight Attendant that I had seen the [update]. Flight departed on time and landed safely in ZZZ.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.