Use "is to be changed" in a sentence

1. If anything is to be changed, it is your music, Monsieur Dubrok.

2. The Christophersen Group went to great trouble, and now everything is to be changed again!

3. Therefore, the International Boundary Line is to be changed under Article III of the 1970 Boundary Treaty.

4. The maker of the Codicil identifies the will that is to be changed by the date of its execution.