Due process. Whenever it is proposed to make an incompetency determination, the beneficiary will be notified of the proposed action and of the right to a hearing as provided in 3.103. Such notice is not necessary if the beneficiary has been declared incompetent by a court of competent jurisdiction or if a guardian has been appointed for the beneficiary based upon a court finding of incompetency. If a hearing is requested it must be held prior to a rating decision of incompetency. Failure or refusal of the beneficiary after proper notice to request or cooperate in such a hearing will not preclude a rating decision based on the evidence of record.