When do account rules override segment rules in a chart of accounts mapping?

You can create a chart of accounts mapping using only segment rules, only account rules, or a combination of both segment and account rules. If an overlap exists between the two types of rule, the account rule supersedes.

Segment rules are used to broadly define the relationship between two charts of accounts on a segment by segment basis. Account rules can be used to more precisely map specific source account combinations to their target accounts.