As I understand it (and this is in every state), any part of vegetation that comes onto your property from a neighboring property is yours to trim.
Added: The above is GENERALLY a true statement with the caveat that you cannot trim so much that it threatens the life of the tree.
California's neighboring states are Oregon, Nevada, and Arizona.
Washington,Oregon,Idaho,California,Utah, and Arizona
Tripartite
Executive, legislative, and judicial.
The state in question is Utah. It has all five of these states as neighbors.
Utah is the US state whose neighbors are Colorado, Wyoming, Idaho, Nevada and Arizona. New Mexico is also a neighboring state, though only at the Four Corners.
Utah is bordered by Colorado, Wyoming, Idaho and Nevada. Salt Lake City is the capital of Utah.
Salt Lake City
Idaho's neighbors, moving clockwise are: Canada Montana Wyoming Utah Nevada Oregon Washington
The Tropicana Hotel is located in the State of Nevada in the city of Las Vegas. Nevada is located in the United States and is the state that is touching California's Eastern border.
Utah is bordered by Colorado, Wyoming, Idaho, Nevada, and Arizona. Salt Lake City is the capital of Utah.
Utah is bordered by Colorado, Wyoming, Idaho, Nevada, and Arizona. Salt Lake City is the capital of Utah.