How can Posting date be defined in Idoc?

For inbound idocs for remittance advices (Idoc type: PEXR2002), is it possible to assign a value for the posting date of the document such that it does not default to the current system date?

Should we use a qualifier in the E1EDK03 segment or is there another field that should be populated with the required posting date?

Thanks & Regards,