Section 33 Improvements.
In this Part the following are referred to as “improvements”—
“1923 Act improvement” means an improvement carried out on an agricultural holding, being an improvement specified in Schedule 3 to this Act, and begun before 31st July 1931;
“1931 Act improvement” means an improvement so carried out, being an improvement specified in Schedule 4 to this Act and begun on or after 31st July 1931 and before 1st November 1948;
“old improvement” means a 1923 Act improvement or a 1931 Act improvement;
“new improvement” means an improvement carried out on an agricultural holding, being an improvement specified in Schedule 5 to this Act begun on or after 1st November 1948.