(1) In making an assessment of the income that is likely to be derived, or was derived, by a bankrupt during a contribution assessment period the trustee may have regard to any information provided by the bankrupt or any other information in the trustee's possession.
(2) If the trustee considers that any information provided by the bankrupt is or may be incorrect, the trustee may disregard that information and may make an assessment on the basis of what the trustee considers to be the correct information.