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 full powers (i.e., the official documents appointing them to act on behalf of their respective states) and found them <answer>in good or proper form.</answer>
How must the full powers of a parties' representatives be found in order to enter into a treaty?
in good or proper form.