At some situation, you may need to set some password setting different than global settings.
For example, if you want to set a password valid time parameter for a user class, named GenericUser, you can use this command
/opt/boksm/sbin/boksadm -S classadm -e -u GenericUser pswvalidtime=365
This command makes password expiration time for GenericUser user class to 365 days.
After running this command you may verify the change by typing
/opt/boksm/sbin/boksadm -S classadm -s -u GenreicUser