1. The members of a grouping shall have unlimited joint and several liability for its debts and other liabilities of whatever nature. National law shall determine the consequences of such liablity.

2. Creditors may not proceed against a member for payment in respect of debts and other liabilities, in accordance with the conditions laid down in paragraph 1, before the liquidation of a grouping is concluded, unless they have first requested the grouping to pay and payment has not been made within an appropriate period.