(1) Part 10 of the Principal Act is amended -

(a) in section 344(1), in paragraph (c) of the definition of "qualifying period" by substituting "31 July 2006" for "31 December 2004",

(b) in section 372A -

(i) in subsection (1), in the definition of "qualifying period":

(I) by substituting in paragraph (a) (ii), "31 July 2006" for "31 December 2004", and

(II) by substituting the following for paragraph (b):

"(b) subject to section 372BA and in relation to a qualifying street, the period commencing on 6 April 2001 and ending on -

(i) 31 December 2004, or

(ii) where subsection (1B) applies, 31 July 2006;",

and

(ii) by inserting the following subsection after subsection (1A):

"(1B) This subsection shall apply in relation to a qualifying street, as respects capital expenditure incurred on the construction or refurbishment of a building or structure, if -

(a)