to a period of assessment which relates to a claim which is made before the commencement date;

to a period of assessment which relates to a claim which is made within 3 months after the commencement date in respect of a period which began before the commencement date; or

where a person suffers from an attack of a disease and under regulation 7 of the Social Security (Industrial Injuries) (Prescribed Diseases) Regulations (Northern Ireland) 1986 (recrudescence) the attack is a recrudescence of a disease for which a claim was made before the commencement date (or within 3 months after the commencement date in respect of a period which began before the commencement date).

“commencement date” means the date on which these Regulations come into operation;

the date on which a claim is made is the date on which the claim is made or treated as made in accordance with the Social Security (Claims and Payments) Regulations (Northern Ireland) 198711; and

a period of assessment which begins on the day following the end of a preceding period of assessment, shall be treated as a continuation of the preceding period of assessment.