SODIS- can we restrict it to a particular output type

Hi experts,

I want disclosures to be sent for just one particular output type and not for others.

We have many output types for application EF (used for Purchase Orders)- One uses "External Send" and others use "Printing", "fax", "Simple mail" etc as transmission medium.

I want disclosures to be send only for "external send" output type and not for "fax" and "simple mail" output types.

How do I control this requirement?

Thanks,

Karthik