The Parliamentary ad hoc committee set up to conduct the inquiry will discuss if the board is still fit to do its job.
It’s emerged Nomvuyo Mhlakaza and Aaron Tshidzumba tendered their resignations at the weekend.
That means chairperson Mbulaheni Maguvhe is the only non-executive member left.
The committee was appointed by the National Assembly and has until January to decide on the board’s future.
Multiple resignations earlier this year had left the board with just three remaining members, while it needed nine to form a quorum.
Three board members resigned after former CEO Hlaudi Motsoeneng was reinstated in a senior management role in September.
