6. Section 4A of the Principal Act is repealed and the following sections are substituted:
“4A. For the purposes of this Act, a person shall be taken to be competent to practise as a veterinary surgeon or specialist veterinary surgeon, as the case requires, only if the person—
(a) has sufficient physical capacity, mental capacity and skill to practise as a veterinary surgeon or specialist veterinary surgeon, as the case requires; and
(b) has sufficient communication skills to practise as a veterinary surgeon or specialist veterinary surgeon, as the case requires, including an adequate command of the English language.
“4B. (1) For the purposes of this Act, a person shall be taken to suffer from an impairment if the person suffers from any physical or mental impairment, disability, condition or disorder which detrimentally affects, or is likely to detrimentally affect, the person's physical or mental capacity to practise as a veterinary surgeon or specialist veterinary surgeon, as the case requires.
“(2) For the purposes of subsection (1), habitual drunkenness or addiction to a deleterious drug shall be taken to be a physical or mental disorder.”.