See ALCOAST 223/07
The ODU is a general purpose uniform that is intended for wear in any situation where a form of a dress uniform is not more appropriate.
The Auxiliary is now a multi-mission force and the ODU is substantially more suited for conveying that to the general public.
Examples where the ODU is appropriate would be outdoor public affairs events where we are trying to convey the multi-mission nature of the Auxiliary such as airshows; marine safety exhibits; events where we have operational facilities on static display (climbing off and on a boat in a tropical blue long uniform is probably not the image we want to convey); flotilla meetings and member training classes.
An example where a more dress uniform might be more appropriate would be indoor boat shows; parades (even though outdoor) conferences in hotels; public education classes.
Since the ODU is the first uniform most members should purchase there are few situations it is not appropriate for wear.