For the purposes of this Directive:
(a) "Unit of account" means the European unit of account (EUA) as defined by Commission Decision 3289/75/ECSC [OJ No L 327, 19.12.1975, p. 4.]. Wherever this Directive refers to the unit of account, the conversion value in national currency to be adopted shall, as from 31 December of each year, be that of the last day of the preceding month of October for which EUA conversion values are available in all the Community currencies;
(b) "Matching assets" means the representation of underwriting liabilities expressed in a particular currency by assets expressed or realizable in the same currency;
(c) "Localization of assets" means the existence of assets, whether movable of immovable, within a Member State but shall not be construed as involving a requirement that movable property be deposited or that immovable property be subjected to restrictive measures such as the registration of mortgages. Assets represented by claims against debtors shall be re