Whenever the National Anthem is played, all naval service personnel not in formation shall stand at attention and face the national ensign. In the event that the national ensign is not displayed, they shall face the source of the music. When covered, they shall come to the salute at the first note of the anthem, and shall remain at the salute until the last note of the anthem.  Persons in formation are brought to order arms or called to attention as appropriate. The formation commander shall face in the direction of the ensign or, in the absence of the ensign, shall face in the direction of the music and shall render the appropriate salute for the unit. Persons in formation participating in a ceremony shall, on command, follow the procedure prescribed for the ceremony. Persons in vehicles or in boats shall follow the procedure prescribed in the following article for such persons during colors. Persons in civilian clothes shall comply with the rules and customs established for civilians.