Firstly add to the System Setup > Defaults > Configuration the ability to edit a key called allowAdminMandatory - which can turn this functionality on/off.
If set to true (default to false) then can we add a checkbox here called "Make Mandatory before ILR can be defined" - this is enabled only if Add "Administration Paperwork" outcome is checked.
Once checked then clicking on this button ...
... IF the Adminsitration Paperwork is not complete says "You need to complete the Administration Paperwork section of the learner's programme on " + nameofprogramme + "before the ILR can be edited and submitted."