Stamford, Conn., Code of Ordinances ch. 146 § 146-55

Affordability means a monthly rent level that is less than or equal to thirty percent (30%) of the monthly income of the most recent tenant in a particular Assisted Housing Unit, expressed as a percentage of Area Median Family Income. Area Median Family Income may be adjusted for family size and revised from time to time by the U.S. Department of Housing and Urban Development.
Assisted housing, or Assisted Housing Units shall mean housing units that receive site-specific, ongoing state, federal, or local operating subsidy in order to make such units affordable to households with gross incomes below fifty percent (50%) of the median family income, as published from time to time by the U.S. Department of Housing and Urban Development and adjusted for household size. "Assisted Housing" shall also include rental housing units that received development or rehabilitation subsidy sufficient to make such units affordable to households with gross incomes below fifty percent (50%) of median family income, provided that such units were deed-restricted with regard to rent levels or Affordability at the time of development, and the deed restriction remains in effect. Assisted Housing Units shall not include any housing units located in a development with four or fewer dwelling units, except for Public Housing.
Conversion shall mean any of the following with regard to a unit which was an Assisted Housing Unit on the effective date of this Ordinance: (1)
Demolition or construction work on an Assisted Housing Unit which renders the unit uninhabitable, as that term is defined in state and local housing codes;
(2) A change in the use of an Assisted Housing Unit to a use other than assisted housing including when an occupied building is emptied of tenants and held unoccupied or largely unoccupied in preparation for a change in use;
(3) A material change in the Affordability or size of unit.
Notice shall mean a written notice.
Public Housing shall mean housing owned by a public housing authority as defined in the Connecticut General Statutes section 8-40 and funded under the United States Housing Act of 1937.42 USC section 1437 or by the State of Connecticut pursuant to Chapter 128 of the Connecticut General Statutes.
Replacement Unit shall be defined to mean a unit of housing which, at a minimum, satisfies the following standards: (1)
Is decent, safe, sanitary and comparable to the converted unit, satisfies state and local health and housing codes, and is comparable in number of rooms and living space to accommodate the tenant household to the converted unit being replaced;
(2) Is located in the City and, to the extent practicable, in the same neighborhood as the converted Assisted Housing Unit;
(3) Has been specifically identified as a Replacement Unit by an owner seeking Conversion of an existing assisted unit; and
(4) At a minimum, satisfies the Affordability requirements of the Assisted Housing Unit it replaces.