From the "using the army list" section.
Highlighted the relevant part,
Quote:
Using the Army List
The following army list allows you to field a Chaos Space Marine
army based on Abbadon’s Black Legion. It can also be used as a
‘stand in’ army list for other Traitor Legions, such as the Death
Guard, World Eaters, Night Lords and Iron Warriors.
Black Legion formations come in three types: core formations,
elite formations and support formation. Each core formation
you include in the army allows you to field any two support
formations. Additionally, if the core formation is a Retinue you
may also field any one elite formation. Although you can only
take an elite or support formation is you first take a core
formation, they are treated as separate independent formations
during the battle and do not have to move around together.
Each formation is made up of one or more units, and may also
include a number of extra units called upgrades. The formation
that may be taken are shown on the chart below. The chart also
shows what units comprise a formation, what upgrades it is
allowed, and its points cost. For example, a Black Legion Retinue
consists of eight Chaos Space Marines, one with a Chaos Lord
or Sorcerer Lord character, for 275 points, and may include a
number of upgrades at an additional cost in points.
Each upgrade that is taken adds to the cost of the formation, as
shown on the upgrade chart. The upgrade chart also lists the
units that make up the upgrade. Note that these will sometimes
replace units in the formation they are taken for, and sometimes
Also if you download the NetEA Tournament Pack all the formations that are allowed a "Lord" character upgrade state that they can have either a Chaos lord or a Sorcerer Lord.