The rules for Selling or Refinancing a Moderately Priced Dwelling Unit (MPDU) after the control period has expired depends on when the MPDU was initially offered (per the MPDU Covenants). If an MPDU was initially offered by the builder through the MPDU program after March 20, 1989, and before April 2005, the homeowner may sell the unit on the open market for a fair market price and pay 50% of the "Shared Profit" to Montgomery County.
Instructions on how the Shared Profit is calculated can be found on the MPDU Homeowners website. Refer to the first link below and go to topic Post control period: MPDU Sales.
Anyone considering a cash out refinance should contact the MPDU Office before they refinance. Due to the shared profit provision of the MPDU law, enough equity should be left in the property so that the owner will be able to pay Montgomery County its shared profit when the unit is sold; therefore, it is important not to refinance for the full market value. Find more information in the second link and go to topic " Post control period: Refinance/Home Equity Loan".