Manual locking workstations

[ANDREA Grover <andreagrover1 () WEBER EDU>]

I am working our Secure Computing Standard and am stuck in discussions about manually locking workstations. We already 
require that workstations are set to automatically lock after a specified time, but are also wondering about making the 
manual locking of workstations a requirement or a recommendation.
 
What policies and/or practices are in place for other universities and groups? Is it a requirement or a recommendation 
that they lock their workstations when they leave it?  
 
If I can get any feedback on this I would appreciate it very much.
 
Andrea Grover
Weber State University - Network Security