81. Sections 78 and 79 do not apply to a contractor:(a) who was bankrupt within the meaning of section 49 and who was not discharged before 15 November 1975 or, in the case of section 76, before 1 April 1980 or any earlier date fixed by proclamation of the Government or, in the case provided for in section 77, before the date he became subject to this act;
(b) who was, or one of whose directors or partners was, during the five years preceding 15 November 1975 or, in the case of section 76, 1 April 1980 or any earlier date fixed by proclamation of the Government or, in the case provided for in section 77, before the date he became subject to this act, convicted of criminal negligence causing death or bodily harm to a worker or of fraud or fraudulent misuse or misappropriation of funds;
(c) who is not liberated from a judgment for debts incurred in debts incurred in the carrying out of construction work.