peter wrote:
Well, what is the current rule regarding compulsory (white) bus stops?

Good question. There was a proposal floated that ALL bus stops would be
treated as a hybrid of the two types, based on observation of "normal"
practice. Namely:

1) All buses SHOULD stop at a bus stop if it looks like someone wishes
to board.

2) If a passenger wishes to alight, they SHOULD ring the bell.

Cheers,

Barry