(1) In the case of any assessment of disablement -

(a) where the period to be taken into account by the assessment began before 1 January 2012, or

(b) where there has been a provisional assessment, and -

(i) the initial period to be taken into account by the assessment began before 1 January 2012, and

(ii) any subsequent period to be taken into account by the assessment begins on or after 1 January 2012,

and the extent of a claimant's disablement is assessed at any of the degrees of disablement severally specified in column (1) of Schedule 3, the amount of any disablement gratuity payable shall -

(I) if the period taken into account by that assessment is limited by reference to the claimant's life or is not less than 7 years, be the amount specified in column (2) of Schedule 3 as appropriate to that degree of disablement,