The following are the key principles integral to the EPCR Challenge Cup draw:
- Each pool of six will contain two TOP 14 clubs.
- As the draw will include three Welsh clubs – Cardiff Rugby, Ospreys and Dragons RFC – each pool will have one Welsh representative.
- The Italian clubs Benetton Rugby and Zebre Parma, who are from the same URC Shield, cannot be in the same pool.
- Connacht Rugby and Ulster Rugby, who are from the same URC Shield, cannot be in the same pool.
- Exeter Chiefs and the Newcastle Falcons, the two Gallagher Premiership qualifiers, cannot be in the same pool.
- The Lions from South Africa, as well as the two invited clubs, Black Lion and the Toyota Cheetahs, cannot be in the same pool.
- A maximum of three URC clubs can be included in the same pool.
- Clubs will play four different opponents home or away during the pool stage and a limited number of same-league fixtures will be unavoidable.
To start the process, all 18 club balls will be placed in the drum, and any three balls will be drawn separately with the first club out of the drum going into Pool 1, the second club out of the drum going into Pool 2 and the third club out of the drum going into Pool 3.
The draw will then continue on an 'open' basis with the next club out of the drum going into Pool 1, the following club out of the drum going into Pool 2, and so on in ascending numerical order until all club balls are drawn or allocated provided that the key principles are adhered to.
If a club cannot be drawn into a pool in accordance with the key principles, then the club will be allocated to the next available pool. The process will then re-start at the pool into which the initial club could not be drawn.