24The services of persons practising or employed as consultants in the field of—
(a)civil engineering;
(b)mechanical, aeronautical, marine, electrical or electronic engineering;
(c)mining, quarrying, soil analysis or other forms of mineralogy or geology;
(d)agronomy, forestry, livestock rearing or ecology;
(e)metallurgy, chemistry, biochemistry or physics; or
(f)any other form of engineering or technology analogous to those mentioned in sub-paragraphs (a) to (e).