The Social Security (Jersey and Guernsey) Order (Northern Ireland) 1994

(5) Benefit, other than lump sum payments, shall be payable in accordance with this Agreement in respect of events which happened before the date of its entry into force, except that an accident which occurred or a disease which developed before that date shall not, solely by virtue of this Agreement, be treated as an industrial accident or an industrial disease if it would not have been so treated under any legislation or Agreement having effect at the time of its occurrence or development. For the purpose of determining claims in accordance with this Agreement, account shall be taken, where appropriate, of insurance periods and periods of residence, employment or presence, completed before the date of its entry into force.