MRS - authorization objects (Multi Resource Scheduling)

Hello,

We are implementing MRS for a customer who does not have proper structural authorizations in place, and they would like to avoid using evaluation paths for the authorization check.

Is there a way to use cost centers to limit user access in MRS? We tried to use cost centers in auth. object MRSS/PB1, but it does not work.

Is it possible to modify the default MRS auth. objects and add some extra auth. fields? Would that auth. check work in planning board?

Is there any other way to limit user access in MRS planning board rather than using evaluation paths?

Thank you

Simon