Article 2U.K.
1.No right shall be acquired under this Regulation in respect of a period prior to the date of its entry into force.
2.All insurance periods and, where appropriate, all periods of employment, of self-employment or of residence completed under the legislation of a Member State before the date of entry into force of this Regulation shall be taken into consideration for the determination of rights to benefits under this Regulation.
3.Subject to paragraph 1, a right shall be acquired under this Regulation though relating to a contingency which materialized prior to the date of entry into force of this Regulation.
4.Any benefit which has not been awarded or which has been suspended by reason of the nationality or place of residence of the person concerned shall, on the application of the person concerned, be awarded or resumed with effect from the entry into force of this Regulation provided that the rights previously determined have not given rise to a lump sum payment.
5.The rights of a person to whom a pension was awarded prior to the entry into force of this Regulation may, on the application of the person concerned, be reviewed, taking into account the provisions of this Regulation. This provision shall also apply to the other benefits referred to in Article 78 of Regulation (EEC) No 1408/71.
6.If an application referred to in paragraph 4 or 5 is submitted within two years from the date of entry into force of this Regulation, the rights acquired under this Regulation shall have effect from that date, and the provisions of the legislation of any Member State concerning the forfeiture or limitation of rights may not be invoked against the persons concerned.
7.If the application referred to in paragraph 4 or 5 is submitted after the expiry of the two-year period following the date of entry into force of this Regulation, rights which have not been forfeited or are not barred by limitation shall have effect from the date on which the application was submitted, except where more favourable provisions of the legislation of any Member State apply.