Minimum Occupation Period (MOP)
Sale of EC
You have to occupy the EC for 5 years from the date of key collection before you can sell it in the open market.
Essential occupiers in EC
Occupiers who are essential in forming a family nucleus with you in the EC application must continue to be listed in the application and stay in the EC during the 5-year MOP.
They cannot make a separate application, or be listed as occupiers in another application to buy an HDB flat or another EC within the MOP.