Checkboxes not working with "Allow users to edit ranges"

Hi Whizbang.
First question I suppose has to be, is there a reason that the cells the checkboxes are linked to need to be locked? If not then unlocking them seems to be an easy solution.
If they are required to be locked, is it possible for you to upload a copy of the workbook with dummmy info in it for people to work on?

Question 1: I was hoping to prevent people from checking sections that do not belong to them. IE, IT staff can only check IT action items. HR can only check HR items.

Question 2: I have attached a workbook.

The purpose of this workbook is to limit the paperwork associated with terminations of employees. When an employee is terminated, certain tasks need to be compelted by different departments. I would like to create a shared file at the time of termination that will then allow the department staff to check off each item as it is completed.

I was hoping to use the native "Allow users to edit ranges" feature to control who can edit what. If it is not possible to use checkboxes in this manner, I will simply come up with a macro solution (ie worksheet change events that test who the user is against a list of who can edit that range), or maybe just have the users enter an "x" or something in the desired cells.

Bump!

Has anyone had similar experiences?

Right now I have unlocked the cells and then used the worksheet change event to test if the user is allowed to change the cell, but I would really prefer not to use the macro if I could. There is always a chance the user could disable their macros and then there would be no security.

I have attached my solution to the problem. It avoids the use of checkboxes altogether. I simulated the behavior and look of a checkbox using the worksheet before double click event.

Note: The attached workbook should be protected and shared, but I have left the file open so that others may see how it works.