If I change an account to allow input = false, will my BR still input data into the account?

Hello,

I have an account that is calculated via a business rule. I don't want end users to input into the account manually. If I set the account to allow input = false, will my business rule still be able to input data into the account? Or do I need to leave it set to allow input = true, but make sure every cube view that uses the account does not allow manual input? Thank you.