What does this passage say about kaffārah for invalidating a make-up fast outside Ramadan?

Kitab al-Sawm: Fasting Hours, Invalidators, Qada and Kaffarah

• The specified Ramadan kaffārah is not due
• The ẓihār expiation is invariably due
• Feeding sixty poor persons is compulsory in every case
• The make-up fast automatically remains valid