An ambiguous term that appears in a written contract may require legal interpretation if the contracting parties cannot agree on this specific meaning. If such a term is subjected to legal examination and a decision, which party does the legal system usually interpret against?

An ambiguous term that appears in a written contract may require legal interpretation if the contracting parties cannot agree on this specific meaning. If such a term is subjected to legal examination and a decision, which party does the legal system usually interpret against?