Honeywell Pegasus FMGS Guide:
The FMS steering command is limited to an optimum maximum bank
angle that gives a stall speedmargin and an initial bank angle limit.Bank
angle limits are described later in this section.
Note: The FCOM definition of EO bank guidance limits (which I cannot find right now, book 4 ?) are different from those I copied.
Yours,
FD (the un-real)
EDIT: OP DES, you beat me to it, by 7 hours. Shall learn to manage my browser better