Spurs.—Spurs will always be worn with boots, whether mounted or dismounted, except that they will not be worn dismounted with field boots by dismounted officers. No officers of the Air Service will wear spurs except when actually mounted. When mounted, with leggins or woolen puttees, spurs will be worn. Black straps will be worn with black boots and russet-leather straps with russet-leather boots and leggins when the latter are worn on mounted occasions. Spurs will be worn points down. S.R. No. 41, No. 5, July 17, 1918.