Answer: 6 months
Explanation:
The Securities and Exchange Commission (SEC) of the United States uses Rule 144 to control and regulate sales transactions involving restricted, unregistered, and control securities.
When an unaffiliated investor to a company whose stock falls under Rule 144 wishes to sell them, they are indeed not bound by volume limitations if they sell after the holding period requirement of 6 months has been met.
This means that from the day the unaffiliated investor purchases and fully pays for the shares, they cannot sell them until 6 months from that very day have elapsed.