Exclude certain carriers from event trigger that auto prints Bill of Lading

Summary:

Attempting to set up auto email/print of Bill of Lading. That is working as expected. What I am trying to understand now is, can I set up any rule sets that would allow me to auto email/print except in certain situations. example would be "Carrier <> XYZ" In the output interface target I have the details but it is greyed out. We have certain carriers where we do not require a BOL. Could I be in the wrong place? Is what I am looking for even possible?

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