17 C.F.R. § 242.203

(a) Long sales. (1) If a broker or dealer knows or has reasonable grounds to believe that the sale of an equity security was or will be effected pursuant to an order marked “long,” such broker or dealer shall not lend or arrange for the loan of any security for delivery to the purchaser's broker after the sale, or fail to deliver a security on the date delivery is due.

(2) The provisions of paragraph (a)(1) of this section shall not apply:

(i) To the loan of any security by a broker or dealer through the medium of a loan to another broker or dealer;

(ii) If the broker or dealer knows, or has been reasonably informed by the seller, that the seller owns the security, and that the seller would deliver the security to the broker or dealer prior to the scheduled settlement of the transaction, but the seller failed to do so; or

(iii) If, prior to any loan or arrangement to loan any security for delivery, or failure to deliver, a national securities exchange, in the case of a sale effected thereon, or a national securities association, in the case of a sale not effected on an exchange, finds:

(A) That such sale resulted from a mistake made in good faith;

(B) That due diligence was used to ascertain that the circumstances specified in § 242.200(g) existed; and

(C) Either that the condition of the market at the time the mistake was discovered was such that undue hardship would result from covering the transaction by a “purchase for cash” or that the mistake was made by the seller's broker and the sale was at a permissible price under any applicable short sale price test.

(b) Short sales. (1) A broker or dealer may not accept a short sale order in an equity security from another person, or effect a short sale in an equity security for its own account, unless the broker or dealer has:

(i) Borrowed the security, or entered into a bona-fide arrangement to borrow the security; or

(ii) Reasonable grounds to believe that the security can be borrowed so that it can be delivered on the date delivery is due; and

(iii) Documented compliance with this paragraph (b)(1).

(2) The provisions of paragraph (b)(1) of this section shall not apply to:

(i) A broker or dealer that has accepted a short sale order from another registered broker or dealer that is required to comply with paragraph (b)(1) of this section, unless the broker or dealer relying on this exception contractually undertook responsibility for compliance with paragraph (b)(1) of this section;

(ii) Any sale of a security that a person is deemed to own pursuant to § 242.200, provided that the broker or dealer has been reasonably informed that the person intends to deliver such security as soon as all restrictions on delivery have been removed. If the person has not delivered such security within 35 days after the trade date, the broker-dealer that effected the sale must borrow securities or close out the short position by purchasing securities of like kind and quantity;

(iii) Short sales effected by a market maker in connection with bona-fide market making activities in the security for which this exception is claimed; and

(iv) Transactions in security futures.

(3) If a participant of a registered clearing agency has a fail to deliver position at a registered clearing agency in a threshold security for thirteen consecutive settlement days, the participant shall immediately thereafter close out the fail to deliver position by purchasing securities of like kind and quantity:

(i) Provided, however, that a participant of a registered clearing agency that has a fail to deliver position at a registered clearing agency in a threshold security on the effective date of this amendment and which, prior to the effective date of this amendment, had been previously grandfathered from the close-out requirement in this paragraph (b)(3) (i.e., because the participant of a registered clearing agency had a fail to deliver position at a registered clearing agency on the settlement day preceding the day that the security became a threshold security), shall close out that fail to deliver position within thirty-five consecutive settlement days of the effective date of this amendment by purchasing securities of like kind and quantity;

(ii) Provided, however, that if a participant of a registered clearing agency has a fail to deliver position at a registered clearing agency in a threshold security that was sold pursuant to § 230.144 of this chapter for thirty-five consecutive settlement days, the participant shall immediately thereafter close out the fail to deliver position in the security by purchasing securities of like kind and quantity;

(iii) Provided, however, that a participant of a registered clearing agency that has a fail to deliver position at a registered clearing agency in a threshold security on the effective date of this amendment and which, prior to the effective date of this amendment, had been previously excepted from the close-out requirement in paragraph (b)(3) of this section (i.e., because the participant of a registered clearing agency had a fail to deliver position in the threshold security that is attributed to short sales effected by a registered options market maker to establish or maintain a hedge on options positions that were created before the security became a threshold security), shall immediately close out that fail to deliver position, including any adjustments to the fail to deliver position, within 35 consecutive settlement days of the effective date of this amendment by purchasing securities of like kind and quantity;

(iv) If a participant of a registered clearing agency has a fail to deliver position at a registered clearing agency in a threshold security for thirteen consecutive settlement days, the participant and any broker or dealer for which it clears transactions, including any market maker that would otherwise be entitled to rely on the exception provided in paragraph (b)(2)(iii) of this section, may not accept a short sale order in the threshold security from another person, or effect a short sale in the threshold security for its own account, without borrowing the security or entering into a bona-fide arrangement to borrow the security, until the participant closes out the fail to deliver position by purchasing securities of like kind and quantity;

(v) If a participant of a registered clearing agency entitled to rely on the 35 consecutive settlement day close-out requirement contained in paragraph (b)(3)(i), (b)(3)(ii), or (b)(3)(iii) of this section has a fail to deliver position at a registered clearing agency in the threshold security for 35 consecutive settlement days, the participant and any broker or dealer for which it clears transactions, including any market maker, that would otherwise be entitled to rely on the exception provided in paragraph (b)(2)(ii) of this section, may not accept a short sale order in the threshold security from another person, or effect a short sale in the threshold security for its own account, without borrowing the security or entering into a bona fide arrangement to borrow the security, until the participant closes out the fail to deliver position by purchasing securities of like kind and quantity;

(vi) If a participant of a registered clearing agency reasonably allocates a portion of a fail to deliver position to another registered broker or dealer for which it clears trades or for which it is responsible for settlement, based on such broker or dealer's short position, then the provisions of this paragraph (b)(3) relating to such fail to deliver position shall apply to the portion of such registered broker or dealer that was allocated the fail to deliver position, and not to the participant; and

(vii) A participant of a registered clearing agency shall not be deemed to have fulfilled the requirements of this paragraph (b)(3) where the participant enters into an arrangement with another person to purchase securities as required by this paragraph (b)(3), and the participant knows or has reason to know that the other person will not deliver securities in settlement of the purchase.

(c) Definitions. (1) For purposes of this section, the term market maker has the same meaning as in section 3(a)(38) of the Securities Exchange Act of 1934 (“Exchange Act”) (15 U.S.C. 78c(a)(38)).

(2) For purposes of this section, the term participant has the same meaning as in section 3(a)(24) of the Exchange Act (15 U.S.C. 78c(a)(24)).

(3) For purposes of this section, the term registered clearing agency means a clearing agency, as defined in section 3(a)(23)(A) of the Exchange Act (15 U.S.C. 78c(a)(23)(A)), that is registered with the Commission pursuant to section 17A of the Exchange Act (15 U.S.C. 78q-1).

(4) For purposes of this section, the term security future has the same meaning as in section 3(a)(55) of the Exchange Act (15 U.S.C. 78c(a)(55)).

(5) For purposes of this section, the term settlement day means any business day on which deliveries of securities and payments of money may be made through the facilities of a registered clearing agency.

(6) For purposes of this section, the term threshold security means any equity security of an issuer that is registered pursuant to section 12 of the Exchange Act (15 U.S.C. 78l) or for which the issuer is required to file reports pursuant to section 15(d) of the Exchange Act (15 U.S.C. 78o(d)):

(i) For which there is an aggregate fail to deliver position for five consecutive settlement days at a registered clearing agency of 10,000 shares or more, and that is equal to at least 0.5% of the issue's total shares outstanding;

(ii) Is included on a list disseminated to its members by a self-regulatory organization; and

(iii) Provided, however, that a security shall cease to be a threshold security if the aggregate fail to deliver position at a registered clearing agency does not exceed the level specified in paragraph (c)(6)(i) of this section for five consecutive settlement days.

(d) Exemptive authority. Upon written application or upon its own motion, the Commission may grant an exemption from the provisions of this section, either unconditionally or on specified terms and conditions, to any transaction or class of transactions, or to any security or class of securities, or to any person or class of persons.