# Design

The Account Rule Module introduces the following concepts:

## Account Rule

An Account Rule allows an account to be substituted for another based on a set of criteria. The substitution is determined by the first matching rule. The account rule contains a set of properties, such as the original Account <account:model-account.account>, the Tax <account:model-account.tax>, or a date range. These are used to work out if the account rule matches the account used.

See also

The available account rules can be found by opening the main menu item:

> Financial ‣ Configuration ‣ General Account ‣ Account Rules