Extraterritorial jurisdiction (ETJ) means all land situated within one half mile in all directions from the corporate boundary of the city and its extensions, and which is not in conflict with the ETJ of another municipality, or with any duly executed boundary agreement with another incorporated municipality. The distance is based on the population and set be law in Texas.
A city’s ETJ is essentially the area outside a city’s corporate limits but within the ultimate planning area. Generally, it can be thought of as a ring around Van which enables the city to regulate subdivision of land, however, it does not allow for zoning regulation.
The screenshot below is directly from the existing Zoning Ordinance, in effect since 1973.