Period closure and Subledger Accounting at OU level

Hello Gurus,

I have few questions regarding multi org design. Suppose if we have one BG , one Ledger and two LE’s and two OU’s respectively under the same ledger. 

1 . Can we close sub ledger periods ie AP, AR and PO’s separately at OU level? As per my understanding period closure works at ledger level not at OU level.

2. Can we run creating accounting at OU level? As per my understating, creating accounting works at ledger level not at OU level.

Please let me know if any possibility is there to achieve period closure and sub ledger accounting program works at OU level under single ledger.