Weaston:
I've been doing Mechanical Drafting and illustration for the better part of 20 Years,and I can tell you The absolute UNQUESTIONABLE industry standard For Drawings is what ever management wants!!!! Now when you are dealing with Military Contracts, you have to abide by their standards. If you were an ISO 9000 Company, it would be up to you ISO Officer to set "Standard". In Drafting there are no fast and hard rules on stuff like this, it's all up to company management, after all at the end of the day they do put food on your table, WHO ARE YOU to question their wants ?
An idea that is not dangerous is unworthy of being called an idea at all, and Consistency is the last refuge of the unimaginative.