That's mostly incorrect. Here's the OTCBB rule, 6545:
Read OTCBB Rule 6545:
6545. Trading and Quotation Halt in OTCBB-Eligible Securities
1. Authority for Initiating a Trading and Quotation Halt
In circumstances in which it is necessary to protect investors and the public interest, NASDAQ may direct members, pursuant to the procedures set forth in paragraph (b), to halt trading and quotations in the over-the-counter ("OTC") market of a security or an American Depository Receipt ("ADR") that is included in the OTC Bulletin Board ("OTCBB") if:
1. the OTCBB security or the security underlying the OTCBB ADR is listed on or registered with a foreign securities exchange or market, and the foreign securities exchange, market, or regulatory authority overseeing such issuer, exchange, or market, halts trading in such security for regulatory reasons because of public interest concerns ("Foreign Regulatory Halt"); provided, however, that NASDAQ will not impose a trading and quotation halt if the Foreign Regulatory Halt was imposed solely for material news, a regulatory filing deficiency, or operational reasons; or
2. the OTCBB security or the security underlying the OTCBB ADR is a derivative or component of a security listed on a national securities exchange or The NASDAQ Stock Market ("listed security") and the national securities exchange or The NASDAQ Stock Market imposes a trading halt in the listed security; or
3. the issuer of the OTCBB security or the security underlying the OTCBB ADR fails to comply with the requirements of SEC Rule 10b-17 regarding Untimely Announcements of Record Dates.
2. Procedure for Initiating a Trading and Quotation Halt
1. When a halt is initiated under subparagraph (a)(1) of this rule, upon receipt of information from a foreign securities exchange or market on which the OTCBB security or the security underlying the OTCBB ADR is listed or registered, or from a regulatory authority overseeing such issuer, exchange, or market, NASDAQ will promptly evaluate the information and determine whether a trading and quotation halt in the OTCBB security is appropriate.
2. Should NASDAQ determine that a basis exists under this rule for initiating a trading and quotation halt, the commencement of the trading and quotation halt will be effective simultaneous with the issuance of appropriate public notice.
3. Trading and quotations in the OTC market may resume when NASDAQ determines that the basis for the halt no longer exists, or when five business days have elapsed from the date NASDAQ initiated the trading and quotation halt in the security, whichever occurs first. NASDAQ shall disseminate appropriate public notice that the trading and quotation halt is no longer in effect.
3. Violation of OTCBB Trading and Quotation Halt Rule
If a security is subject to a trading and quotation halt initiated pursuant to this rule, it shall be deemed conduct inconsistent with just and equitable principles of trade and a violation of Rule 2110 for a member:
1. to effect, directly or indirectly, a trade in such security; or
2. to publish a quotation, a priced bid and/or offer, an unpriced indication of interest (including "bid wanted" and "offer wanted" indications), or a bid or offer accompanied by a modifier to reflect unsolicited customer interest, in any quotation medium. For purposes of this Rule, "quotation medium" shall mean any quotation system, publication, electronic communication network, or any other device, including any issuer or inter-dealer quotation system, that is used to regularly disseminate quotations or indications of interest in transactions in equity securities.
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