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Existing means of light and ventilation may remain and not be increased in area if they are in compliance with the code in force at the time the building was built or altered. If the room sizes are altered, the light and ventilation requirements of Chapter 13-172 shall be met, except that existing courts or light wells need not be increased in size.
(Prior code § 78.1-37; Amend Coun. J. 7-14-93, p. 35326; Amend Coun. J. 4-29-98, p. 66679, § 2)