QUES: The key principle is that promises and treaties must be respected including the social contract between the states citizens and their legitimate ruler

correct the punctuation.

CORRECTED: The key principle is that promises and treaties must be respected, including the social contract between the state's citizens and their legitimate ruler.

QUES: It is important to note that some XML editing environments can only export in XML but not read XML files back in

correct the punctuation.

CORRECTED: It is important to note that some XML editing environments can only export in XML - but not read XML files back in.

QUES: Since 112012 BERNINA My Label V1 is no longer in the BERNINA product range

correct the punctuation.

CORRECTED:
Since 1/1/2012, BERNINA My Label V1 is no longer in the BERNINA product range.