Rules for Check in and Check out

The following rules apply to check ins and check outs:

Only one user can check out a model at a time.
Only the user, model owner, or encyclopedia administrator that checked out the model can check it in.
Except for the initial check in, a model must be checked out before each check in.
When you choose the read-only option, CA Gen does not mark the model or subset as checked out.
You cannot check in a model or a subset that is checked out as read-only. You can create a new model from a model or subset checked out as read-only.

You can check in and check out models in two ways: