The Industrial Overlay District was intended preserve underlying zoning districts and eliminate the need for Sysco to apply for zoning variances that, if granted, could be appealed.

He also curtailed urban sprawl by reforming the system of land use planning to preserve open spaces and agricultural districts.

It was created by the British North America of 1867 which preserved existing electoral districts in Lower Canada.

Fort Atkinson's 19th- and early 20th-century building history is preserved in the Main Street and Merchants Avenue historic districts.

Most buildings in Vienna are relatively low; in early 2006 there were around 100 buildings higher than 40 m. The number of high-rise buildings is kept low by building legislation aimed at preserving green areas and districts designated as world cultural heritage.

In New York, "right to farm" laws are intended to preserve agricultural districts like the Finger Lakes, and many hog farmers here are very opposed to regulations that would limit their livelihood.

Attorney General Eliot Spitzer, whose office defended the state and other parties named in the suit, said the ruling "should encourage communities throughout New York to implement 'smart growth' policies to preserve open space, community character, historic districts and wildlife habitat."

Portions of it were reassigned to 4 different congressional districts, all of which largely preserved other former districts.

The river turns to the west and flows through woodland forest preserve districts in Lake County and Cook County (and through the city of Des Plaines), northwest of Chicago.

Protecting incumbents, preserving black and Hispanic districts and respecting seniority will be the criticial factors when New York State legislative leaders redraw Congressional district lines next year to reflect the loss of 3 of the state's 34 districts.