The institution of each Member State shall calculate, under the legislation it applies, the amount due corresponding to periods of voluntary or optional continued insurance which, under Article 53(3)(c) of the basic Regulation, shall not be subject to another Member State’s rules relating to withdrawal, reduction or suspension.
Where the legislation applied by the competent institution does not allow it to determine this amount directly, on the grounds that that legislation allocates different values to insurance periods, a notional amount may be established. The Administrative Commission shall lay down the detailed arrangements for the determination of that notional amount.