The booking conditions are listed on a separate, additional spreadsheet in the Excel export of media plans. They can include content such as disclaimers or other relevant information. 

A booking condition is always linked to a specific medium. This means that only if a booking condition has been added to a medium and this has been included in a plan, the "Booking conditions" spreadsheet will be attached to the export of the plan:

In addition to the medium name, this worksheet also lists the booking conditions in tabular form (see above). 

The content of the booking condition should always refer to the "Publisher > Medium" combination.