can you expand on this "Liability by Shares - Limited (Ltd) refers to the limitation of liability enjoyed by the owners (or members) of the company. This is one of the privileges of incorporation as a limited liability company bestowed by the legislation, as a policy principle in order to encourage investment. Limited by shares refers to the liability of the shareholders of the company is limited to the amount remaining unpaid on the shares they hold." and tell me about a company having legal capacity in accordance with s 124 of the Corporations Act 2001 (Cth) to hold liability for the company's debt.