SAP ECC - Authorizations tcode PA20/PA30

Hi all,

I have a doubt about how the system identifies the values associate to PA20 and PA30 transactions in a role with this two transactions.

Both transaction have the object P_ORGIN but when keep this both transactions in a role the system create different profiles bellow this object.

I know that one is for PA20 (because have R value in field  AUTHC) and another is for PA30 (because have W value in field  AUTHC) but my doubt is how the system validate the correct values to PA20 or PA30 when a user access to this transactions.

Thanks

Regards