How to add an additional Bussines Unit BU for cross-charge options but only for an Expenditure Type?

Summary:

How to add a BU for cross-charge options but only for an Expenditure Type?

Content (required):

We have the CL Tablaruca project associated to its main BU: "CL ATLAS RE BU", we want to add cross-charge options for another BU "CL ATLAS TAB BU" but only for the "Travel" expenditure type. How can we achieve this?

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

23B

Code Snippet (add any code snippets that support your topic, if applicable):

NA