"211 Exceptions Before an equity issue can be quoted, a market maker should first determine if it is eligible for one of the following exceptions under SEC Rule 15c2-11:
The security is piggyback eligible. A security becomes piggyback eligible when it has been quoted on the Pink Sheets by at least one market maker for a minimum of 30 days. Piggy back eligible securities are identified on pinksheets.com with the text "Piggyback Qualified" and on the OTC Dealer as "PBQ"."