The rule requires employers to establish and maintain a respiratory protection program and includes requirements for program administration; worksite-specific procedures; respirator selection; employee training; fit testing; medical evaluation; respirator use; cleaning, maintenance, and repair; and other provisions.
Employers are required to have an maintain proper employee training under the rule.
If you missed the links in the article, click to read about an amateur historian's account of Wittgenstein's influence on Hitler and to read about the strange world of Hitler Studies.