Terms of Use

These terms govern the Hamilton website and the two research connectors it describes, Hamilton Customs and Hamilton Tax & Law. Using the site or the connectors means you accept them. If you do not accept them, do not use the service.

1. What the service is

Hamilton is a documentary information service on United States customs law and federal tax law. It maintains a corpus of official public sources, among them the Harmonized Tariff Schedule and its chapter-99 chronology, Titles 19 and 26 of the U.S. Code, 19 CFR and 26 CFR, Internal Revenue Bulletin guidance, income tax treaties, and published rulings and opinions, and serves them to Claude, Anthropic’s assistant, so they can be read and cited in your conversation.

What the service returns is documentary: texts, dates, citations and readings of the record. It does not render decisions, determinations or opinions of any authority.

2. Not professional advice

The service is a research aid for professionals, not a professional. Nothing it returns is legal, tax, customs or accounting advice, and no attorney-client, accountant-client or broker-client relationship is created by using it.

Drafted output, a return, an entry, a protest, a memorandum, a letter, ships as a draft for review by a qualified professional: on the tax side, review by a practitioner within the meaning of Circular 230; on the customs side, the importer of record and its licensed broker keep the duty of reasonable care. Verify every citation against the official publication before relying on it.

3. Use within Claude

The connectors operate inside Claude, on claude.ai, in Claude Desktop and in the Claude mobile apps. Your use of Claude is governed by Anthropic’s own terms and policies, which are separate from these terms and are not the publisher’s responsibility. Hamilton is an independent service: it is not affiliated with, sponsored by or endorsed by Anthropic, and it is not a government service.

4. Open access

During the launch period, the connectors are open: no account is created, no registration is required and no payment is collected on this site. Access is intended to become a subscription service; terms will be published on this site before any change. The publisher may modify, suspend or discontinue all or part of the service at any time, and updates the record as the underlying sources evolve; there is no commitment to permanent availability.

5. Acceptable use

Use the service lawfully and reasonably. In particular, do not:

• attempt to disrupt, overload, probe or gain unauthorized access to the service;
• misrepresent output of the service as an official determination, ruling or publication of any agency or court;
• use the service in violation of applicable law or of the rights of others.

6. The record and its limits

The record is compiled from official public sources with care and served as is and as available. The publisher does not warrant that it is complete, current, uninterrupted or free of errors, and does not warrant any outcome from its use. Only the official publications of the United States, the statutes, the Federal Register, the agencies and the courts, are authoritative; where the record and an official publication disagree, the official publication prevails.

7. Your responsibility

You remain solely responsible for anything you file, declare, sign or submit, entries, returns, protests, disclosures, elections and all other filings, and for the decisions you take. You are responsible for the accuracy of the facts and dates you supply in your questions, and for professional review of any draft before use.

8. Limitation of liability

To the fullest extent permitted by applicable law, the publisher is not liable for indirect, incidental, special, consequential or punitive damages, nor for lost profits, penalties, interest or assessments, arising out of or in connection with the use of, or inability to use, the service. Where liability cannot be excluded, it is limited to the greatest extent the law allows. Nothing in these terms excludes or limits liability that cannot lawfully be excluded or limited.

9. Intellectual property

The statutes, regulations, rulings and opinions served by the record are official publications; works of the United States government are in the public domain under 17 U.S.C. § 105. The site’s design, wordmark, arrangement and original text belong to the publisher. Claude and Anthropic are trademarks of Anthropic, PBC; other names and marks cited on this site belong to their respective owners and are used to describe sources and compatibility, not affiliation.

10. Changes to these terms

These terms may be revised as the service evolves. The date at the top of this page identifies the version in force; continued use of the service after a revision is acceptance of the revised terms.

Publisher identification: see the Legal Notice. Data handling: see the Privacy Policy.