Notts Outlaws have been placed alongside bothof this year's finalists in Group C of the 2012 Clydesdale Bank 40.
Notts will face reigning champions Surrey Lions, runners-up Somerset Sabres, Durham Dynamos, Hampshire Royals, Glamorgan and Scotland in search of a semi-final place.
Fixtures are yet to be confirmed but the competition format will remain unchanged with three group winners joined by the best runner-up in the knockout stages.
Group A
Netherlands
Leicestershire Foxes
Worcestershire Royals
Lancashire Lightning
Middlesex Panthers
Essex Eagles
Gloucestershire Gladiators
Group B
Scotland
Durham Dynamos
Hampshire Royals
Surrey Lions
Welsh Dragons (Glamorgan)
Somerset
Notts Outlaws
Group C
Unicorns
Derbyshire Falcons
Yorkshire Carnegie
Kent Spitfires
Warwickshire Bears
Sussex Sharks
Northamptonshire Steelbacks