Русско-англо-русский юридический словарь

What is BODY? [...] Also the main part of any instrument; in deeds it is spoken of as distinguished from the recitals and other introductory parts and signatures; in affidavits, from the title and jurat (The Law Dictionary)

In addition to these changes, there are also a number of smaller changes, including two additions to the preamble — the introductory part of the statute. (CBC)