the reason you cant find info on the PD site is because it was revamped about a year two years ago. it used to be prodrift-irl.com(i think).
if your looking for info on irish drifting D-rift is also a championship worth looking at because in its finer days it was seen as somewhat of a stepping stone into PD with some of prodrifts now finest drifters fighting for a championship right down to the last dy of the chapionship