Officers in this status are considered by the board to be in-zone. Officers may review ref (b) and their eligibility for the board on the internet at the officer promotion homepage. The senior and junior officers in-zone and the junior officer eligible below-zone are as follows (Encl (2) of ref. (b) applies): 2.a.
duplex - a house with two units sharing a common wall. duplex house, semidetached house. house - a dwelling that serves as living quarters for one or more families; he has a house on Cape Cod; she felt she had to get out of the house. duplex apartment. apartment, flat - a suite of rooms usually on one floor of an apartment house.
In North America, a duplex house is a dwelling having apartments with separate entrances for two households. This includes two-story houses having a complete apartment on each floor and also side-by-side apartments on a single lot that share a common wall.