I want to disable sudo su

[Todd C. Miller]

In message <39D1DFDA.437BE03E at ea-dc.dhl.com>
	so spake "Shaji Nair" (shnair):

>    I want to disable sudo su for all users. I am using sudo to have a
> log of all the commands used by Sysadmins to be logged, for that i
> have given userid All  = (All) All permission and i would like to
> disable only the sudo su command. Can you please help me by giving
> the details.