Where to assign accounting principles?

hello,

I have some misunderstanding of FI configuration in S4HANA 1610

In path SPRO:

1 .Financials Accounting (New) > Financials Accounting Global Settings > Ledgers > Ledger > Define Settings for Ledgers and Currency Types -

I can configure G/L (eg 0L) add to it CCodes (1010) and for every CCodes I can assign accounting priciples (eg IFRS). After creation of G/L system creates Leadger Group for that G/L.

2. Financial Accounting (New) > General Ledger Accounting (New) > Periodic Processing > Valuate > Check Assignment of Accounting Principle to Ledger Group

I can assign Ledger group to accounting principles. This assignments can be different than these done in no 1.

Which of them is used when? Could anyone explain it to me?

Adam