(1) Subject to this Act, the rate (in this Chapter referred to as "the scheduled rate") of carer's allowance shall be -

(a) in the case of a person who is a carer of more than one relevant person, the weekly rate set out in column (2) at reference 8(a) in Part 1 of Schedule 4, and

(b) in any other case, the weekly rate set out in column (2) at reference 8(b) in Part 1 of Schedule 4, increased by -

(i) the appropriate amount set out -

(I) in column (4) of that Part opposite that reference in respect of each qualified child who has not attained the age of 12 years who normally resides with the beneficiary, and

(II) in column (5) of that Part opposite that reference in respect of each qualified child who has attained the age of 12 years who normally resides with the beneficiary,