You tried to express an issue. It is not clear.
However I understand that you have a problem with workers reporting for work without wearing safety shoes. If they produce a letter from medical stating that they have some kind of ailment with which they are unable to wear footwear you want to exempt them from wearing shoes at work.
Sorry to say that from safety it is not acceptable. If safety shoes is made mandatory at work; what ever may be the reason no one shall be permitted to enter the premises without it.
No one has the authority to grant exemption in such cases. You do not require a draft for medical recommendation to that effect pl.
28th August 2010 From India, Kollam