Autoinvoice Date Derivation Logic

Hi,

I have a Sales Order having two lines only, one shipped on 31-May (last day of May period) and interfaced to AR but not yet imported and other shipped on 01-Jun (first day of Jun period) and interfaced to AR but not yet imported. My May period is opened and Jun period is 'Not Opened'. Batch source 'GL Date in A Closed Period' for the sales invoice source is 'Reject'. On 2nd Jun, I ran AutoInvoice Import for that batch source.

1) Will the Autoinvoice import the invoice line with 31-May ship date and reject the other line of Jun period? If not, then how would I ensure my May line only should get imported and invoiced in May and my Jun line should get invoiced in Jun-17?