Property owners cannot be forced to allow a neighbor to transport cannabis over an easement on their land, even if the crop was licensed by local authorities, a California appellate court held Tuesday.

In a unanimous, published decision that touches on land use issues, property rights and the ongoing state-federal tension over cannabis, a three-justice panel of the Second District Court of Appeal, Division Six said the property owner's objection to a federally illegal substance being moved across her land is sufficient to invalidate the neighboring grower's county-issued conditional use permit.