Object Security - Object Security is used to restrict the PeopleTools objects that specific developers can access.

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PS8.0, PT8.15. 

Application designer - Go - PeopleTools - Object Security.

Create a Group Id - Select type of object - The windows will be splitted into two boxes. Then move the objects, to which access has to be given to the developer/s, into the left side of window.  Save the Group Id.

Now link the Group Id to the permission list which is attached to the developer userid.