18. (1) The categories in which a person may register in the quantity surveying profession are -
(a) Professional Quantity Surveyor;
(b) Candidate Quantity Surveyor; or
(c) specified categories prescribed by the council.
(2) A person may not practise in any of the categories contemplated in subsection (1), unless he or she is registered in that category.
(3) A person who is registered in the category of candidate must perform work in the quantity surveying profession only under the supervision and control of a professional of a category as prescribed.