The contracting parties' full names or sovereign titles are often included in the preamble, along with the full names and titles of their representatives, and a boilerplate clause about how their representatives have communicated (or exchanged) their <answer>full powers</answer> (i.e., the official documents appointing them to act on behalf of their respective states) and found them in good or proper form.
What are the official documents appointing a party's representative to act on their behalf?
full powers