Once the OBS is linked to an entity, the OBS can not be modified.
If the OBS requires to be enabled for access rights, you can do it via XOG.
Steps to perform:
1. XOG out the OBS by using the obs_read.xml file
You can use the following tag:
<Filter name="name" criteria="EQUALS">Department OBS</Filter>
2. Edit the output file and locate the following tag:
obs code="department_obs" isSecurity="false"
3. Modify the isSecurity tag to "true"
4. XOG the OBS in
You will notice that the OBS is now access rights enabled.