As respects the year of assessment 1999-2000 and subsequent years of assessment, the Principal Act is hereby amended -

(a) by the substitution of the following for section 462:

"462. Widowed parents and other single parents: standard rated allowance.

(1)

(a) In this section -

'appropriate percentage', in relation to a year of assessment, means a percentage equal to the standard rate of tax for that year;

'qualifying child', in relation to any claimant and year of assessment, means -

(i) a child -

(I) born in the year of assessment,

(II) who, at the commencement of the year of assessment, is under the age of 18 years, or

(III) who, if over the age of 18 years at the commencement of the year of assessment -

(A) is receiving full-time instruction at any university, college, school or other educational establishment, or

(B) is permanently incapacitated by reason of mental or physical infirmity from maintaining himself or herself and had become so permanently incapacitated before he or she had attained the age of 21 years or had become so permanently incapacitated after attaining the age of 21 years but while he or she had been in receipt of such full-time instruction,

and