1.Where the date on which the contingency arises precedes 1 January 1987 and where the claim for a pension has not yet resulted in an award before that date, such claim shall, in as much as benefits must be granted, pursuant to such contingency, for a period prior to the last-mentioned date, give rise to a double award:
(a)for the period prior to 1 January 1987, in accordance with the provisions of the Regulation or of agreements in force between the Member States concerned;
(b)for the period commencing on 1 January 1987, in accordance with the provisions of the Regulation.
If, however, the amount calculated in pursuance of the provisions referred to under (a) is greater than that calculated in pursuance of the provisions referred to under (b), the person concerned shall continue to be entitled to the amount calculated in pursuance of the provisions referred to under (a).
2.A claim for invalidity, old-age or survivors' benefits submitted to an institution of a Member State from 1 January 1987 shall automatically necessitate the reassessment, in accordance with the provisions of the Regulation, of the benefits which have been awarded for the same contingency prior to that date by the institution or institutions of one or more of the other Member States, without prejudice to the provisions of Article 3.
3.The rights of the persons concerned who obtained the award of pensions prior to 1 January 1987 in the territory of the Member State in question may be revised at their request in the light of the provisions of Council Regulation (EEC) No 3811/86(1).
4.If the request referred to in paragraph 3 is submitted within one year following 1 January 1987, entitlement to rights under Regulation (EEC) No 3811/86 shall be acquired from 1 January 1987 or from the date of the entitlement to a pension where the last-mentioned date is subsequent to 1 January 1987; in such case the provisions of the legislation of any Member State with regard to the withdrawal or limitation of rights may not be relied upon as against the persons concerned.
5.If the request referred to in paragraph 3 is submitted after expiry of the period of one year following 1 January 1987, entitlement to rights acquired under Regulation (EEC) No 3811/86 which have not been withdrawn or in respect of which the period of limitation has not been exceeded shall be acquired from the date on which the request is submitted, unless more favourable provisions of the legislation of any of the Member States are applicable.