Each time a team is drawn, a ball representing the pool they will compete in will be drawn from the ERC draw bag by ERC Chief Executive, Derek McGrath.
The aim is to ensure that there are four teams in each Pool and that there is no more than one team from each country in a Pool, with the exception of France who have seven teams and so will have two of their clubs in one of the Pools.
PHASE 1: The six top seeded teams from each nation - Biarritz Olympique Pays Basque, Sale Sharks, Ulster Rugby, Benetton Treviso, Cardiff Blues and Edinburgh Gunners will be drawn out of the ERC draw drum and assigned a Pool number. That process will give the leading team for each pool.
PHASE 2: The five French teams ranked 2-6 will be next to be drawn from the drum. They are Toulouse, Stade Francais Paris, Perpignan, Agen and Bourgoin. Only five balls (the Pool containing Biarritz will be excluded) will go into the draw bag to determine their Pool placements.
PHASE 3: After the five French teams come the remaining five English clubs - Leicester Tigers, London Irish, London Wasps, Gloucester Rugby and Northampton Saints - who will be drawn out and allocated their Pools. The Pool containing Sale Sharks will be excluded from the draw bag.
PHASES 4, 5 AND 6: The two remaining Irish teams - Leinster and the 2006 Heineken Cup champions Munster - will be placed in Pools (Ulster Rugby's Pool excluded from the draw), followed by Italian sides Ghial Rugby Calvisano and Overmach Rugby Parma (Benetton Treviso's Pool excluded from the draw) and then the remaining two Welsh regions, Llanelli Scarlets and the Ospreys (Cardiff Blues' Pool excluded).
PHASES 7 AND 8: The remaining Scottish representative, Border Reivers, will then be allocated a Pool (excluding Edinburgh Gunners' Pool) and then the seventh and final French club - Castres Olympique - will be placed in the final vacant Pool position.