Proposed by Zev Yaroslavsky, Joel Wachs,[1] and Marvin Braude, and placed on the ballot in November 1986, Prop.
The passage of the ballot initiative halved the allowable residential density throughout much of Los Angeles.
U also specifically reduced the allowable size of new buildings on 70-85 percent of the commercial and industrial areas of Los Angeles by one-half.
U had no organized opposition, critics included developers and members of the city council, who argued that the measure would cost jobs.
U is still considered a core rule by which builders in the Los Angeles area have to abide when constructing new office buildings,[9] but limits for residential construction have been eased by the passage of Measure JJJ, which encourages density and affordable housing near transit hubs.