10.35—Requirements for covered opinions.

(a) A practitioner who provides a covered opinion shall comply with the standards of practice in this section.
(b) Definitions. For purposes of this subpart—
(1) A practitioner includes any individual described in § 10.2(a)(5).
(2) Covered opinion— (i) In general. A covered opinion is written advice (including electronic communications) by a practitioner concerning one or more Federal tax issues arising from—
(A) A transaction that is the same as or substantially similar to a transaction that, at the time the advice is rendered, the Internal Revenue Service has determined to be a tax avoidance transaction and identified by published guidance as a listed transaction under 26 CFR 1.6011-4(b)(2) ;
(B) Any partnership or other entity, any investment plan or arrangement, or any other plan or arrangement, the principal purpose of which is the avoidance or evasion of any tax imposed by the Internal Revenue Code; or
(C) Any partnership or other entity, any investment plan or arrangement, or any other plan or arrangement, a significant purpose of which is the avoidance or evasion of any tax imposed by the Internal Revenue Code if the written advice—
(1) Is a reliance opinion;
(2) Is a marketed opinion;
(3) Is subject to conditions of confidentiality; or
(4) Is subject to contractual protection.
(ii) Excluded advice. A covered opinion does not include—
(A) Written advice provided to a client during the course of an engagement if a practitioner is reasonably expected to provide subsequent written advice to the client that satisfies the requirements of this section;
(B) (b) n advice, other than advice described in paragraph (b)(2)(i)(A) of this section (concerning listed transactions) or paragraph (b)(2)(ii)(B) of this section (concerning the principal purpose of avoidance or evasion) that—
(1) Concerns the qualification of a qualified plan;
(2) Is a State or local bond opinion; or
(3) Is included in documents required to be filed with the Securities and Exchange Commission;
(C) Written advice prepared for and provided to a taxpayer, solely for use by that taxpayer, after the taxpayer has filed a tax return with the Internal Revenue Service reflecting the tax benefits of the transaction. The preceding sentence does not apply if the practitioner knows or has reason to know that the written advice will be relied upon by the taxpayer to take a position on a tax return (including for these purposes an amended return that claims tax benefits not reported on a previously filed return) filed after the date on which the advice is provided to the taxpayer;
(D) Written advice provided to an employer by a practitioner in that practitioner's capacity as an employee of that employer solely for purposes of determining the tax liability of the employer; or
(E) Written advice that does not resolve a Federal tax issue in the taxpayer's favor, unless the advice reaches a conclusion favorable to the taxpayer at any confidence level (e.g., not frivolous, realistic possibility of success, reasonable basis or substantial authority) with respect to that issue. If written advice concerns more than one Federal tax issue, the advice must comply with the requirements of paragraph (c) of this section with respect to any Federal tax issue not described in the preceding sentence.
(3) A Federal tax issue is a question concerning the Federal tax treatment of an item of income, gain, loss, deduction, or credit, the existence or absence of a taxable transfer of property, or the value of property for Federal tax purposes. For purposes of this subpart, a Federal tax issue is significant if the Internal Revenue Service has a reasonable basis for a successful challenge and its resolution could have a significant impact, whether beneficial or adverse and under any reasonably foreseeable circumstance, on the overall Federal tax treatment of the transaction(s) or matter(s) addressed in the opinion.
(4) Reliance opinion— (i) Written advice is a reliance opinion if the advice concludes at a confidence level of at least more likely than not (a greater than 50 percent likelihood) that one or more significant Federal tax issues would be resolved in the taxpayer's favor.
(ii) (b) poses of this section, written advice, other than advice described in paragraph (b)(2)(i)(A) of this section (concerning listed transactions) or paragraph (b)(2)(i)(B) of this section (concerning the principal purpose of avoidance or evasion), is not treated as a reliance opinion if the practitioner prominently discloses in the written advice that it was not intended or written by the practitioner to be used, and that it cannot be used by the taxpayer, for the purpose of avoiding penalties that may be imposed on the taxpayer.
(5) Marketed opinion— (i) Written advice is a marketed opinion if the practitioner knows or has reason to know that the written advice will be used or referred to by a person other than the practitioner (or a person who is a member of, associated with, or employed by the practitioner's firm) in promoting, marketing or recommending a partnership or other entity, investment plan or arrangement to one or more taxpayer(s).
(ii) (b) poses of this section, written advice, other than advice described in paragraph (b)(2)(i)(A) of this section (concerning listed transactions) or paragraph (b)(2)(i)(B) of this section (concerning the principal purpose of avoidance or evasion), is not treated as a marketed opinion if the practitioner prominently discloses in the written advice that—
(A) The advice was not intended or written by the practitioner to be used, and that it cannot be used by any taxpayer, for the purpose of avoiding penalties that may be imposed on the taxpayer;
(B) The advice was written to support the promotion or marketing of the transaction(s) or matter(s) addressed by the written advice; and
(C) The taxpayer should seek advice based on the taxpayer's particular circumstances from an independent tax advisor.
(6) Conditions of confidentiality. Written advice is subject to conditions of confidentiality if the practitioner imposes on one or more recipients of the written advice a limitation on disclosure of the tax treatment or tax structure of the transaction and the limitation on disclosure protects the confidentiality of that practitioner's tax strategies, regardless of whether the limitation on disclosure is legally binding. A claim that a transaction is proprietary or exclusive is not a limitation on disclosure if the practitioner confirms to all recipients of the written advice that there is no limitation on disclosure of the tax treatment or tax structure of the transaction that is the subject of the written advice.
(7) Contractual protection. Written advice is subject to contractual protection if the taxpayer has the right to a full or partial refund of fees paid to the practitioner (or a person who is a member of, associated with, or employed by the practitioner's firm) if all or a part of the intended tax consequences from the matters addressed in the written advice are not sustained, or if the fees paid to the practitioner (or a person who is a member of, associated with, or employed by the practitioner's firm) are contingent on the taxpayer's realization of tax benefits from the transaction. All the facts and circumstances relating to the matters addressed in the written advice will be considered when determining whether a fee is refundable or contingent, including the right to reimbursements of amounts that the parties to a transaction have not designated as fees or any agreement to provide services without reasonable compensation.
(8) Prominently disclosed. An item is prominently disclosed if it is readily apparent to a reader of the written advice. Whether an item is readily apparent will depend on the facts and circumstances surrounding the written advice including, but not limited to, the sophistication of the taxpayer and the length of the written advice. At a minimum, to be prominently disclosed an item must be set forth in a separate section (and not in a footnote) in a typeface that is the same size or larger than the typeface of any discussion of the facts or law in the written advice.
(9) State or local bond opinion. A State or local bond opinion is written advice with respect to a Federal tax issue included in any materials delivered to a purchaser of a State or local bond in connection with the issuance of the bond in a public or private offering, including an official statement (if one is prepared), that concerns only the excludability of interest on a State or local bond from gross income under section 103 of the Internal Revenue Code, the application of section 55 of the Internal Revenue Code to a State or local bond, the status of a State or local bond as a qualified tax-exempt obligation under section 265(b)(3) of the Internal Revenue Code, the status of a State or local bond as a qualified zone academy bond under section 1397E of the Internal Revenue Code, or any combination of the above.
(10) The principal purpose. For purposes of this section, the principal purpose of a partnership or other entity, investment plan or arrangement, or other plan or arrangement is the avoidance or evasion of any tax imposed by the Internal Revenue Code if that purpose exceeds any other purpose. The principal purpose of a partnership or other entity, investment plan or arrangement, or other plan or arrangement is not to avoid or evade Federal tax if that partnership, entity, plan or arrangement has as its purpose the claiming of tax benefits in a manner consistent with the statute and Congressional purpose. A partnership, entity, plan or arrangement may have a significant purpose of avoidance or evasion even though it does not have the principal purpose of avoidance or evasion under this paragraph (b)(10).
(c) Requirements for covered opinions. A practitioner providing a covered opinion must comply with each of the following requirements.
(1) Factual matters. (i) The practitioner must use reasonable efforts to identify and ascertain the facts, which may relate to future events if a transaction is prospective or proposed, and to determine which facts are relevant. The opinion must identify and consider all facts that the practitioner determines to be relevant.
(ii) The practitioner must not base the opinion on any unreasonable factual assumptions (including assumptions as to future events). An unreasonable factual assumption includes a factual assumption that the practitioner knows or should know is incorrect or incomplete. For example, it is unreasonable to assume that a transaction has a business purpose or that a transaction is potentially profitable apart from tax benefits. A factual assumption includes reliance on a projection, financial forecast or appraisal. It is unreasonable for a practitioner to rely on a projection, financial forecast or appraisal if the practitioner knows or should know that the projection, financial forecast or appraisal is incorrect or incomplete or was prepared by a person lacking the skills or qualifications necessary to prepare such projection, financial forecast or appraisal. The opinion must identify in a separate section all factual assumptions relied upon by the practitioner.
(iii) The practitioner must not base the opinion on any unreasonable factual representations, statements or findings of the taxpayer or any other person. An unreasonable factual representation includes a factual representation that the practitioner knows or should know is incorrect or incomplete. For example, a practitioner may not rely on a factual representation that a transaction has a business purpose if the representation does not include a specific description of the business purpose or the practitioner knows or should know that the representation is incorrect or incomplete. The opinion must identify in a separate section all factual representations, statements or findings of the taxpayer relied upon by the practitioner.
(2) Relate law to facts. (i) The opinion must relate the applicable law (including potentially applicable judicial doctrines) to the relevant facts.
(ii) (c) ctitioner must not assume the favorable resolution of any significant Federal tax issue except as provided in paragraphs (c)(3)(v) and (d) of this section, or otherwise base an opinion on any unreasonable legal assumptions, representations, or conclusions.
(iii) The opinion must not contain internally inconsistent legal analyses or conclusions.
(3) Evaluation of significant Federal tax issues —(i) In general. The opinion must consider all significant Federal tax issues except as provided in paragraphs (c)(3)(v) and (d) of this section.
(ii) Conclusion as to each significant Federal tax issue. The opinion must provide the practitioner's conclusion as to the likelihood that the taxpayer will prevail on the merits with respect to each significant Federal tax issue considered in the opinion. If the practitioner is unable to reach a conclusion with respect to one or more of those issues, the opinion must state that the practitioner is unable to reach a conclusion with respect to those issues. The opinion must describe the reasons for the conclusions, including the facts and analysis supporting the conclusions, or describe the reasons that the practitioner is unable to reach a conclusion as to one or more issues. If the practitioner fails to reach a conclusion at a confidence level of at least more likely than not with respect to one or more significant Federal tax issues considered, the opinion must include the appropriate disclosure(s) required under paragraph (e) of this section.
(iii) Evaluation based on chances of success on the merits. In evaluating the significant Federal tax issues addressed in the opinion, the practitioner must not take into account the possibility that a tax return will not be audited, that an issue will not be raised on audit, or that an issue will be resolved through settlement if raised.
(iv) Marketed opinions. In the case of a marketed opinion, the opinion must provide the practitioner's conclusion that the taxpayer will prevail on the merits at a confidence level of at least more likely than not with respect to each significant Federal tax issue. If the practitioner is unable to reach a more likely than not conclusion with respect to each significant Federal tax issue, the practitioner must not provide the marketed opinion, but may provide written advice that satisfies the requirements in paragraph (b)(5)(ii) of this section.
(v) Limited scope opinions. (A) The practitioner may provide an opinion that considers less than all of the significant Federal tax issues if—
(1) The practitioner and the taxpayer agree that the scope of the opinion and the taxpayer's potential reliance on the opinion for purposes of avoiding penalties that may be imposed on the taxpayer are limited to the Federal tax issue(s) addressed in the opinion;
(2) The opinion is not advice described in paragraph (b)(2)(i)(A) of this section (concerning listed transactions), paragraph (b)(2)(i)(B) of this section (concerning the principal purpose of avoidance or evasion) or paragraph (b)(5) of this section (a marketed opinion ); and
(3) The opinion includes the appropriate disclosure(s) required under paragraph (e) of this section.
(B) A practitioner may make reasonable assumptions regarding the favorable resolution of a Federal tax issue (an assumed issue) for purposes of providing an opinion on less than all of the significant Federal tax issues as provided in this paragraph (c)(3)(v). The opinion must identify in a separate section all issues for which the practitioner assumed a favorable resolution.
(4) Overall conclusion. (i) The opinion must provide the practitioner's overall conclusion as to the likelihood that the Federal tax treatment of the transaction or matter that is the subject of the opinion is the proper treatment and the reasons for that conclusion. If the practitioner is unable to reach an overall conclusion, the opinion must state that the practitioner is unable to reach an overall conclusion and describe the reasons for the practitioner's inability to reach a conclusion.
(ii) In the case of a marketed opinion, the opinion must provide the practitioner's overall conclusion that the Federal tax treatment of the transaction or matter that is the subject of the opinion is the proper treatment at a confidence level of at least more likely than not.
(d) Competence to provide opinion; reliance on opinions of others. (1) The practitioner must be knowledgeable in all of the aspects of Federal tax law relevant to the opinion being rendered, except that the practitioner may rely on the opinion of another practitioner with respect to one or more significant Federal tax issues, unless the practitioner knows or should know that the opinion of the other practitioner should not be relied on. If a practitioner relies on the opinion of another practitioner, the relying practitioner's opinion must identify the other opinion and set forth the conclusions reached in the other opinion.
(2) The practitioner must be satisfied that the combined analysis of the opinions, taken as a whole, and the overall conclusion, if any, satisfy the requirements of this section.
(e) Required disclosures. A covered opinion must contain all of the following disclosures that apply—
(1) Relationship between promoter and practitioner. An opinion must prominently disclose the existence of—
(i) Any compensation arrangement, such as a referral fee or a fee-sharing arrangement, between the practitioner (or the practitioner's firm or any person who is a member of, associated with, or employed by the practitioner's firm) and any person (other than the client for whom the opinion is prepared) with respect to promoting, marketing or recommending the entity, plan, or arrangement (or a substantially similar arrangement) that is the subject of the opinion; or
(ii) Any referral agreement between the practitioner (or the practitioner's firm or any person who is a member of, associated with, or employed by the practitioner's firm) and a person (other than the client for whom the opinion is prepared) engaged in promoting, marketing or recommending the entity, plan, or arrangement (or a substantially similar arrangement) that is the subject of the opinion.
(2) Marketed opinions. A marketed opinion must prominently disclose that—
(i) The opinion was written to support the promotion or marketing of the transaction(s) or matter(s) addressed in the opinion; and
(ii) The taxpayer should seek advice based on the taxpayer's particular circumstances from an independent tax advisor.
(3) Limited scope opinions. A limited scope opinion must prominently disclose that—
(i) The opinion is limited to the one or more Federal tax issues addressed in the opinion;
(ii) Additional issues may exist that could affect the Federal tax treatment of the transaction or matter that is the subject of the opinion and the opinion does not consider or provide a conclusion with respect to any additional issues; and
(iii) With respect to any significant Federal tax issues outside the limited scope of the opinion, the opinion was not written, and cannot be used by the taxpayer, for the purpose of avoiding penalties that may be imposed on the taxpayer.
(4) Opinions that fail to reach a more likely than not conclusion. An opinion that does not reach a conclusion at a confidence level of at least more likely than not with respect to a significant Federal tax issue must prominently disclose that—
(i) The opinion does not reach a conclusion at a confidence level of at least more likely than not with respect to one or more significant Federal tax issues addressed by the opinion; and
(ii) With respect to those significant Federal tax issues, the opinion was not written, and cannot be used by the taxpayer, for the purpose of avoiding penalties that may be imposed on the taxpayer.
(5) Advice regarding required disclosures. In the case of any disclosure required under this section, the practitioner may not provide advice to any person that is contrary to or inconsistent with the required disclosure.
(f) Effect of opinion that meets these standards —(1) In general. An opinion that meets the requirements of this section satisfies the practitioner's responsibilities under this section, but the persuasiveness of the opinion with regard to the tax issues in question and the taxpayer's good faith reliance on the opinion will be determined separately under applicable provisions of the law and regulations.
(2) Standards for other written advice. A practitioner who provides written advice that is not a covered opinion for purposes of this section is subject to the requirements of § 10.37.
(g) Effective date. This section applies to written advice that is rendered after June 20, 2005.

Code of Federal Regulations

[T.D. 9011, 67 FR 48771, July 26, 2002, as amended by T.D. 9165, 69 FR 75842, Dec. 20, 2004; 70 FR 19892, Apr. 15, 2005; 70 FR 28825, May 19, 2005; T.D. 9359, 72 FR 54549, Sept. 26, 2007]