ATP Subjects
Ok the subjects are valid for 5 years from your writing and passing the last subject.
However to do an ATP test your license will have to be valid - so technically you have to keep the license valid to keep the subjects, If however you do let the license lapse you would need to get that re-instated and that could be a lot of heart-ache. If you have a CPL/IF you can stay current by doing regular IF renewals and some can even be done on approved Simulators in South Africa. I know there are at Lanseria, Grand Central and Wonderboom amongst others.
Good Luck
VG300