Not sure what your getting confused on? I agree with brsele. You could also say Rule 2-034 means not to use steel conduit as a replacement for copper conductors!!!
I didn't post this topic as a joke. I couldn't find this rule in the Code book.The problem is that I got this in the Notice of Deficiency from an inspector and an explanation for this rule is "Panel covers shall be installed.
2-034 Use of approved equipment No person shall use electrical equipment for any purpose or in any manner other than the purpose or manner for which it is intended.
If the inspector said panel covers shal be installed i would think he might quote 2-202 or other rule from 2-200. Cover on or off, i am assuming the panel was being used as a panel?