They are restricted until they are released by the company issuing the stock
Even if you have met the conditions of Rule 144, you can't sell your restricted securities to the public until you've gotten the legend removed from the certificate. Only a transfer agent can remove a restrictive legend. But the transfer agent won't remove the legend unless you've obtained the consent of the issuer—usually in the form of an opinion letter from the issuer's counsel—that the restricted legend can be removed. Unless this happens, the transfer agent doesn't have the authority to remove the legend and execute the trade in the marketplace.
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