If there is an Additional Clause that isn't applicable to the fixture, there are two options available:

1. Mark the Additional Clause as 'not applicable'.  

Click on the down arrow on the right hand side of the clause, and toggle ON Not Applicable.  This will soft remove the clause from this CP but if the CP is copied and the clause becomes applicable, the toggle can be removed/switched off and the clause will be reinstated.

2. Delete the Additional Clause
Clicking the trash icon will delete the clause.  When deleted, the clause is permanently (hard) deleted.  This means there is no reference to it in the CP and should it need to be reinstated as part of a future fixture, it will need to be added again.