Subject to the provisions of this section, no person shall produce or otherwise acquire, or dispose of, or import into the Republic or export from there, or be in possession of, or use, or convey or cause to be conveyed, any Group
IV hazardous substance, except in terms of a written authority under subsection (2) and in accordance with-
(a) the prescribed conditions; and
(b) such further conditions (if any) as the Director-General may in each case determine.