Except in exigent circumstances where advance notice is not practicable, at least two business days before filing a multi-debtor chapter 11 or chapter 15 case with more than $100 million in cumulative assets or liabilities, counsel for the debtors or foreign representatives must advise the clerk and the United States trustee – without disclosing the identity of the debtors – of the impending filing and any anticipated emergency relief to be requested.