I'm going to throw a wrench into the discussion that some will find difficult to swallow, and others will find relief!
Our troop has made this definition:
The troop has determined due to cost amongst other factors that clean normal fitting blue or black jeans are the apporpriate pants to wear, scout pants or shorts are also welcomed, but not required. Participation in District Council or National training, activities such as jamborees, camporalls, require a full scout uniform (khaki shirt, olive pants, socks, neckerchief, slide)
Class A - Khaki shirt with Sash required for Boards and courts of Honor, with neckerchief.
Class B- Khaki shirt and Neckerchief with slide of choice.
Class C- Activity uniform (red t-shirt) with BSA and troop insignia.
You salute in any of these three uniforms. Socks are optional!
Whatever works for your troop and is acceptable within the guidelines in 2005 should be the standard uniform. I have seen troops make camouflage pants their "scout pants" - This is clearly not acceptable by BSA rules.
An established standard is then an acceptable uniform in which the scout can feel comfortable in saluting his flag.
What is a scout hat?
(don't answer- I don't really want to know!)