There is a particular need for a special reference diverging from the law of the opening State in the case of rights in rem, since these are of considerable importance for the granting of credit. The basis, validity and extent of such a right in rem should therefore normally be determined according to the lex situs and not be affected by the opening of insolvency proceedings. The proprietor of the right in rem should therefore be able to continue to assert his right to segregation or separate settlement of the collateral security.