Expenditure item date in future open period in Payables

Hello Friends

Can some one explain the process of interfacing the costs from AP to PA

We have a situation where an invoice has been created from iexpenses with multiple lines and each line has got different expenditure item dates and one of the lines has an expenditure item date which is in an future open period

DOes the PRC Interface supplier costs program interface the costs line by line or all in one go (waiting for the future peiod to be open and then interface all the lines in that period)?

Please clarify

Thanks

Dilip