Cape Town - New Zealand's Glen Jackson will referee Saturday's South African Super Rugby derby between the Stormers and Bulls at Newlands.
Kick-off is at 15:05.
Jackson will be assisted by his countryman Nick Briant and South Africa's Divan Uys, with local official Marius Jonker the television match official (TMO).
Earlier on Saturday, Australia's Nic Berry will referee the Sharks' clash against the Waratahs in Sydney (11:45 SA time).
Berry will be assisted by compatriots Damon Murphy and Amy Perrett, with Australia's George Ayoub the TMO.
On Friday, New Zealand's Paul Williams will referee the Lions' encounter against the Crusaders in Christchurch (09:35 SA time).
Williams will be assisted by countrymen Mike Fraser, James Munro (assistant referees) and Aaron Paterson (TMO).
Other South African involvement this weekend sees Rasta Rasivhenge referee the Hurricanes v Chiefs match in Wellington on Saturday (09:35 SA time) and Marius van der Westhuizen take charge of the aguares v Brumbies clash in Buenos Aires later the same day (23:40 SA time).