Use of custom rules without customizing JERS

Summary:

How can a custom account rule be used within seeded JERS?

Content (please ensure you mask any confidential information):

The seeded JERS 'Delivery to Expense' uses the accounting classes 'Expense' and 'Receiving Inspection', as per screenshot below. The account rule 'Expense' from the Expense accounting class appears in several seeded JERS.

A new account rule has been customized to replace the previously seeded 'Expense' account rule.
Instead of making a copy of each JERS and customizing it to include the new account rule, how may the new account rule be utilized throughout all seeded JERS?

Version (include the version you are using, if applicable):