(B) If a taxpayer requests in writing an opinion from the tax commissioner as to whether or how certain property, income, source of income, or a certain activity or transaction will be taxed, the commissioner's written response shall be an "opinion of the tax commissioner" and shall bind the commissioner, in accordance with divisions (C), (G), and (H) of this section, provided all of the following conditions are satisfied:

1. (1) The taxpayer's request fully describes the specific facts or circumstances relevant to a determination of the taxability of the property, income, source of income, activity, or transaction, and, if an activity or transaction, all parties involved in the activity or transaction are clearly identified by name, location, or other pertinent facts.
2. (2) The request relates to a "tax" as defined in section 5703.50 of the Revised Code.
3. (3) The commissioner's response is signed by the commissioner and designated as an "opinion of the tax commissioner."

(C) An opinion of the tax commissioner shall remain in effect and shall protect the taxpayer for whom the opinion was prepared and who reasonably relies on it from liability for any taxes, penalty, or interest otherwise chargeable on the activity or transaction specifically held by the commissioner's opinion to be taxable in a particular manner or not to be subject to taxation for any tax year that may be specified in the opinion, or until the earliest of the following dates:

1. (1) The effective date of a written revocation by the commissioner sent to the taxpayer by certified mail, return receipt requested. The effective date of the revocation shall be the taxpayer's date of receipt or one year after the issuance of the opinion, whichever is later;
2. (2) The effective date of any rule adopted by the commissioner under Chapter 119. of the Revised Code that is inconsistent with the opinion;
3. (3) The effective date of any amendment or enactment of a relevant section of the Revised Code or uncodified law;
4. (4) The date on which a court issues an opinion establishing or changing relevant case law with respect to the Revised Code, uncodified law, or rules of the tax commissioner;
5. (5) If the opinion of the commissioner was based on the interpretation of federal law, the effective date of any change in the relevant federal statutes or regulations, or the date on which a court issues an opinion establishing or changing relevant case law with respect to federal statutes or regulations;
6. (6) The effective date of any change in the taxpayer's material facts or circumstances;
7. (7) The effective date of the expiration of the opinion, if specified, in the opinion.

(E) If the commissioner provides written advice under this section, the opinion shall include a statement that:

1. (1) The tax consequences stated in the opinion may be subject to change for any of the reasons stated in division (C) of this section;
2. (2) It is the duty of the taxpayer to be aware of such changes.