Layouts - restrict authorisation to save user-specific only

Dear all,

we would like to restrict all end-users to only be able to save user-specific layouts across FB* transactions and others. In other words they should not be able to save global layouts visible to other users. I have read about the I_SAVE = U parameter but that would have to be set for every report individually as far as I understand. We are after an authorisations object that restrict the user to generally save user-specific layouts only. Many thanks! Cheers Stefan