Exhibit 8.1 May 30, 2002 To the Addressees Listed On Schedule A attached hereto Re: The Issuance and Sale of $288,000,000 of Class A-1 1.9291% Asset Backed Notes, $335,000,000 of Class A-2 2.70% Asset Backed Notes, $365,000,000 of Class A-3 3.58% Asset Backed Notes, $345,800,000 of Class A-4 4.21% Asset Backed Notes, and $34,200,000 of 4.24% Asset Backed Certificates by Chase Manhattan Auto Owner Trust 2002-B ------------------------------------------------------- Ladies and Gentlemen: We have acted as United States federal tax counsel ("Federal Tax Counsel") for Chase Manhattan Bank USA, National Association, a national banking association organized under the laws of the United States (the "Seller"), in connection with the issuance and sale of (i) $288,000,000 of Class A-1 1.9291% Asset Backed Notes, (ii) $335,000,000 of Class A-2 2.70% Asset Backed Notes, (iii) $365,000,000 of Class A-3 3.58% Asset Backed Notes, (iv) $345,800,000 of Class A-4 4.21% Asset Backed Notes (collectively, the "Notes") and (v) $34,200,000 of 4.24% Asset Backed Certificates (the "Certificates" and, together with the Notes, the "Securities"), by Chase Manhattan Auto Owner Trust 2002-B, a statutory business trust organized under the Business Trust Act of the State of Delaware (the "Trust"), pursuant to: (a) with respect to the Notes, the Indenture, dated as of June 1, 2002 (the "Indenture"), between the Trust and Wells Fargo Bank Minnesota, National Association, as trustee (the "Indenture Trustee"); and (b) with respect to the Certificates, the Amended and Restated Trust Agreement, dated as of June 1, 2002 (the "Trust Agreement"), between the Seller and Wilmington Trust Company, as owner trustee (the "Owner Trustee"). The Securities will be offered for sale to investors pursuant to the Prospectus Supplement (the "Prospectus Supplement") to the Prospectus dated January 22, 2002 (the "Prospectus"). All capitalized terms used in this opinion letter and not otherwise defined herein shall have the meaning assigned to such terms in the Prospectus Supplement. -2- May 30, 2002 In delivering this opinion, we have reviewed: (i) the Prospectus, (ii) the Prospectus Supplement, (iii) the Indenture, (iv) the Trust Agreement, (v) the Sale and Servicing Agreement dated as of June 1, 2002 (the "Sale and Servicing Agreement") between the Seller and the Trust, (vi) forms of the Securities and (vii) the representation letter to us from the Seller dated May 30, 2002 (the "Representation Letter"). We also have examined such other documents, papers, statutes and authorities as we have deemed necessary to form the basis for the opinions expressed herein. In our examination of such materials, we have assumed the genuineness of all signatures, the authenticity of all documents submitted to us as originals and the conformity to original documents of copies of documents submitted to us. As to certain matters of fact relevant to the opinions hereinafter expressed, we have relied upon the representations and warranties set forth in the Indenture, the Trust Agreement and the Sale and Servicing Agreement. In addition, we have relied on certain representations made to us by the Seller in the Representation Letter. On the basis of the foregoing and assuming, with your permission, that (i) the Trust is formed and maintained in accordance with the discussion set forth in the Prospectus and the Prospectus Supplement and is operated in compliance with the terms of the Trust Agreement, (ii) the terms of the Indenture, the Trust Agreement and the Sale and Servicing Agreement are not amended, (iii) the representations made in the Representation Letter are true and accurate in all material respects, and (iv) the aggregate amount of the Late Fees received or accrued each year by the Trust on, or with respect to, the Receivables will be equal to, or less than, five percent (5%) of the aggregate amount of the Late Fees and interest or other income accrued or received by the Trust on, or with respect to, the Receivables each such year, we hereby confirm (a) our opinions (the "Prospectus Opinions") set forth in the Prospectus Supplement under the caption "Certain Federal Income Tax Consequences" and (b) that, subject to the qualifications set forth therein, the statements set forth in the Prospectus Supplement under the caption "Certain Federal Income Tax Consequences," insofar as such statements purport to constitute summaries of the United States federal tax law, regulations or legal conclusions with respect thereto, constitute accurate summaries of the matters discussed therein in all material respects. We express no opinion with respect to the transactions referred to herein and in the Prospectus or the Prospectus Supplement other than as expressly set forth herein. The Prospectus Opinions are not binding on the Internal Revenue Service ("IRS") and the IRS could disagree with the Prospectus Opinions. Although we believe that the Prospectus Opinions we express herein would be sustained if challenged, there can be no assurance that this will be the case. Our opinions are based upon the Code, the Treasury regulations promulgated thereunder and other relevant authorities and law, all as in effect on the date hereof. Consequently, future changes in the law may cause the tax treatment of the transactions referred to herein to be materially different from that described above. -3- May 30, 2002 We are members of the Bar of the State of New York, and we do not express any opinion herein concerning any law other than the federal law of the United States. This opinion letter is rendered to each of the addressees in connection with the above described transaction. This opinion may not be relied upon by any such addressee for any other purpose, or relied upon by, or furnished to, any other person, firm or corporation without our prior written consent. Very truly yours, /s/ SIMPSON THACHER & BARTLETT Schedule A to the Tax Opinion Dated May 30, 2002 for Chase Manhattan Auto Owner Trust 2002-B Chase Manhattan Bank USA, National Association White Clay Center Building 200 Newark, Delaware 19801 J.P. Morgan Securities Inc., As Representative of the Several Underwriters named in Schedule I to the Note Underwriting Agreement 270 Park Avenue New York, New York 10017 J.P. Morgan Securities Inc. 270 Park Avenue New York, New York 10017 Fitch, Inc. One State Street Plaza New York, New York 10004 Moody's Investors Service 99 Church Street New York, New York 10004 Standard & Poor's Ratings Group 55 Water Street New York, New York 10041 Wells Fargo Bank Minnesota National Association Sixth Street and Marquette Avenue Minneapolis, Minnesota 55479 Wilmington Trust Company Rodney Square North 1100 North Market Street Wilmington, Delaware 19890