Can I Opened Receivables Periods without Opened General Ledger Periods ?

When we migrated to version 12.1.3 the consulter said that to Open Periods of (Payables, Receivables and others modules).

First of all the General Ledger should be Opened in the same period.

After period of General Ledger opened, I can open others modules.

Because this month, my periods are:

Receivables

JUN-15-Closed

JUL-15-Opened

Payables

JUN-15-Closed

JUL-15-Opened

General Ledger

JUN-15-Opened

JUL-15-Future

I ask: Is necessary open the General Ledger periods to open others module periods in R12?

Thanks

Thiago