(1) Section 603A of the Principal Act is amended by substituting the following for subsection (1):

"(1) In this section 'child of a parent', in relation to a disposal for which relief is claimed under this section, includes an individual who resided with, was under the care of and was maintained at the expense of the person making the disposal throughout -

(a) a period of 5 years, or

(b) periods which together comprised at least 5 years,

before the first-mentioned individual attained the age of 18 years but only if such claim is not based on the uncorroborated testimony of one witness, and a disposal by a parent to a child of a parent shall be construed accordingly.

(1A) This section applies to the disposal of land which at the date of the disposal has a market value which does not exceed €254,000.".

(2) This section applies to disposals made on or after the date of the passing of this Act.