Rule 26. Duty to Disclose; General Provisions Governing Discovery
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(b) Discovery Scope and Limits.

    (1) Scope in General.  Unless otherwise limited by court order, the scope of discovery is as follows: Parties may obtain discovery regarding any
    nonprivileged matter that is relevant to any party’s claim or defense — including the existence, description, nature, custody, condition,
    and location of any documents or other tangible things and the identity and location of persons who know of any discoverable matter. For good
    cause, the court may order discovery of any matter relevant to the subject matter involved in the action. Relevant information need not be
    admissible at the trial if the discovery appears reasonably calculated to lead to the discovery of admissible evidence. All discovery is subject to
    the limitations imposed by Rule 26(b)(2)(C).

    (2) Limitations on Frequency and Extent.
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        (C) When Required.  On motion or on its own, the court must limit the frequency or extent of discovery otherwise allowed by these
        rules or by local rule if it determines that:
            (i) the discovery sought is unreasonably cumulative or duplicative, or can be obtained from some other source that is
            more convenient, less burdensome, or less expensive;
            (ii) the party seeking discovery has had ample opportunity to obtain the information by discovery in the action; or
            (iii) the burden or expense of the proposed discovery outweighs its likely benefit, considering the needs of the case, the
            amount in controversy, the parties’ resources, the importance of the issues at stake in the action, and the
            importance of the discovery in resolving the issues.

    (3) Trial Preparation: Materials.

        (A) Documents and Tangible Things.  Ordinarily, a party may not discover documents and tangible things that are prepared in anticipation of litigation or for
        trial by or for another party or its representative (including the other party’s attorney, consultant, surety, indemnitor, insurer, or agent). But, subject to Rule
        26(b)(4), those materials may be discovered if:
            (i) they are otherwise discoverable under Rule 26(b)(1); and
            (ii) the party shows that it has substantial need for the materials to prepare its case and cannot, without undue
            hardship, obtain their substantial equivalent by other means.

        (B) Protection Against Disclosure.  If the court orders discovery of those materials, it must protect against disclosure of the mental
        impressions, conclusions, opinions, or legal theories of a party’s attorney or other representative concerning the litigation.

        (C) Previous Statement.  Any party or other person may, on request and without the required showing, obtain the person’s own
        previous statement about the action or its subject matter. If the request is refused, the person may move for a court order, and Rule
        37(a)(5) applies to the award of expenses. A previous statement is either:
            (i) a written statement that the person has signed or otherwise adopted or approved; or
            (ii) a contemporaneous stenographic, mechanical, electrical, or other recording — or a transcription of it —
            that recites substantially verbatim the person’s oral statement.

    (4) Trial Preparation: Experts.

        (A) Expert Who May Testify.  A party may depose any person who has been identified as an expert whose opinions may be
        presented at trial. If Rule 26(a)(2)(B) requires a report from the expert, the deposition may be conducted only after the
        report is provided.
   
        (B) Expert Employed Only for Trial Preparation.  Ordinarily, a party may not, by interrogatories or deposition, discover facts
        known or opinions held by an expert who has been retained or specially employed by another party in anticipation of litigation or
        to prepare for trial and who is not expected to be called as a witness at trial. But a party may do so only:
            (i) as provided in Rule 35(b); or
            (ii) on showing exceptional circumstances under which it is impracticable for the party to obtain facts or opinions on the
            same subject by other means.
   
        (C) Payment. Unless manifest injustice would result, the court must require that the party seeking discovery:
            (i) pay the expert a reasonable fee for time spent in responding to discovery under Rule 26(b)(4)(A) or (B); and
            (ii) for discovery under (B), also pay the other party a fair portion of the fees and expenses it reasonably incurred in
            obtaining the expert’s facts and opinions.

    (5) Claiming Privilege or Protecting Trial- Preparation Materials.
        (A) Information Withheld.  When a party withholds information otherwise discoverable by claiming that the information is privileged or subject to
        protection as trial-preparation material, the party must:
            (i) expressly make the claim; and
            (ii) describe the nature of the documents, communications, or tangible things not produced or disclosed — and do so in a
            manner that, without revealing information itself privileged or protected, will enable other parties to assess the claim.
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(g) Signing Disclosures and Discovery Requests, Responses, and Objections.

    (1) Signature Required; Effect of Signature.  Every disclosure under Rule 26(a)(1) or (a)(3) and every discovery request, response, or
    objection must be signed by at least one attorney of record in the attorney’s own name — or by the party personally, if unrepresented — and must
    state the signer’s address, e-mail address, and telephone number. By signing, an attorney or party certifies that to the best of the person’s
    knowledge, information, and belief formed after a reasonable inquiry:
        (A) with respect to a disclosure, it is complete and correct as of the time it is made; and
        (B) with respect to a discovery request, response, or objection, it is:
            (i) consistent with these rules and warranted by existing law or by a nonfrivolous argument for extending,
            modifying, or reversing existing law, or for establishing new law;
            (ii) not interposed for any improper purpose, such as to harass, cause unnecessary delay, or needlessly
            increase the cost of litigation; and
            (iii) neither unreasonable nor unduly burdensome or expensive, considering the needs of the case, prior discovery in
            the case, the amount in controversy, and the importance of the issues at stake in the action.

    (2) Failure to Sign.  Other parties have no duty to act on an unsigned disclosure, request, response, or objection until it is signed, and the court must
    strike it unless a signature is promptly supplied after the omission is called to the attorney’s or party’s attention.

    (3) Sanction for Improper Certification.  If a certification violates this rule without substantial justification, the court, on motion or
    on its own, must impose an appropriate sanction on the signer, the party on whose behalf the signer was acting, or both. The sanction may
    include an order to pay the reasonable expenses, including attorney’s fees, caused by the violation.