Rule 2...

Rule 2: As a matter of precaution, it is necessary that the piece of cloth worn round the waist should cover the portion from the navel to the knee; the other piece should cover both the shoulders, arms and a considerable part of the back. As a matter of obligatory precaution, both the pieces must be worn before the intention and Talbiyah. If the intention and Talbiyah precede the wearing of the ihram, the pilgrim must repeat both, after wearing the ihram, as a matter of preferential precaution.

Rule 3: If through ignorance or oversight, the ihram is worn over a shirt, the shirt must be removed immediately and the ihram is valid. Indeed, most evidently, the ihram is valid…