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.
A duplex is a multifamily home, in the same category as a triplex of four plex, meaning there are multiple attached living units. But what is truly distinctive is the way they are bought and sold. With multifamily homes, such as a duplex, all of these dwellings are sold together. (The units are not sold separately.) So if you buy a duplex, you get both sides. If you buy a triplex, you get three units. Sometimes an owner will live in one of the homes and renters are in the rest. Many times, though, all of these multifamily homes are entirely leased out.