Revocation of unique identification number: fraud, misrepresentation, or mistake permit cancellation after opportunity to be heard. Where a Unique Identification Number was obtained through fraud or misrepresentation or allotted by mistake, the Board may revoke it after giving the person an opportunity to make representations and without prejudice to other legal action; every revocation order must be in writing, and from the date of revocation the regulations apply as if no number had been allotted.