Where, at the time when:
(a) the Court orders under section 233, 459A, 459B or 461 that a company be wound up; or
(b) a company resolves by special resolution that it be wound up voluntarily;
a winding up of the company is already in progress, all proceedings in the last - mentioned winding up are taken to have been valid, except so far as the Court otherwise orders because fraud or mistake has been proved.