The opening weekend will see two Super League referees appointed for the first two games of the tournament.
Thaler will take charge of the opening fixture on Friday night between Australia and Scotland at the Lightstream Stadium in Hull and Hicks will referee the game on Saturday between England and New Zealand.
Two NRL referees will take charge of the second round of Ladbrokes Four Nations games, the international double header at the Ricoh Arena in Coventry on Saturday 5 November.
The match official appointments for the third round of games and the Ladbrokes Four Nations Final at Anfield, will then be awarded on merit, based on the performances of the four referees in the first two rounds of games.
The three-person panel making these decisions consists of Steve Ganson (RFL Head of Match Officials), Tony Archer (NRL General Manager Officiating) and Luke Watts (NZRL National Referee Development Officer).
It has also been confirmed that Australian Bernard Sutton will join the Match Officials group as a Video Referee along with Touch Judge Anthony Elliott from New Zealand.
Ladbrokes Four Nations Tournament Director, Jon Dutton, said: “A tremendous amount of work and thought has gone into the appointments process and I am very grateful to Steve, Tony and Luke for their vision and collaboration.
“The tournament has appointed four high performing world-class referees who will be joined by an excellent team of support officials.
The decision to award matches based on merit rather than country neutrality is a progressive move by all concerned and shows the confidence we have in officials and the focus on recognising and rewarding good performance.”