Where a person was, at the time when he or she became a
bankrupt, liable in respect of distinct contracts as a member of 2 or more
distinct firms, or as a sole contractor and also as a member of a firm, the
fact that the firms are in whole or in part composed of the same
individuals, or that the sole contractor is also a member of the firm, does
not prevent proof in respect of the contracts against the estates respectively
liable on the contracts.