How do I manage what employees can see when submitting an employee referral? Help!!

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I am trying to make sure that I have selected the proper viewing rights in Recruit. We have established our employee referral link, which enables an employee to type in their name and the information of the person they are referring to the company.  They are also prompted to upload the resume of the employee referral. However, our referral page gives you the option of assocating a specific requisition with the referral. I'm trying to figure out how to only show OPEN requisitions and limit what information they can see in the actual requisition.  It's currently showing our salary range