По моему наоборот:
3.3 In cases where the investment does not concern the company's share capital... In such companies, they may also hold the position of an unpaid Director.

То есть если 6.2 не через инвестиции в компанию, то можно быть unpaid director. А если через инвестиции, то можно быть нормальным директором в этой компании, см. пункт 3.2:

3.2 The applicant and his spouse shall confirm that they do not intend to undertake any sort of employment in the Republic with the exception of their employment as Directors in a Company in which they have chosen to invest under this policy.