Part 9 of the Principal Act is amended -

(a) in section 268(9) by substituting the following for paragraph (d):

"(d) by reference to paragraph (g), as respects capital expenditure incurred in the period commencing on 3 December 1997 and ending -

(i) on 31 December 2009, or

(ii) where subsection (17) (a) applies, on 30 June 2010, or

(iii) where subsection (17) (b) applies, on 30 June 2011,",

(b) in section 268(9) by substituting the following for paragraphs (f) and (g):

"(f) by reference to paragraph (i), as respects capital expenditure incurred in the period commencing on 2 December 1998 and ending -

(i) on 31 December 2009, or

(ii) where subsection (17) (a) applies, on 30 June 2010, or

(iii) where subsection (17) (b) applies, on 30 June 2011,

(g) by reference to paragraph (j), as respects capital expenditure incurred in the period commencing -

(i) where subsection (2A) (d) (i) applies, on 15 May 2002, or

(ii) where subsection (2A) (d) (ii) applies, on 28 March 2003,