county boundary might change because of Assessor Parcel Numbers 1013-531-09, 1013-531-10, and 1013-531-11

"The Cities of Chino and Pomona and San Bernardino County agree that the county
boundary change option is the preferred route; however, they also recognize the complexity
in addressing the island through a county boundary change, which can take years to
process including collaboration with multiple agencies. In addition, it also requires close
coordination between the Counties of San Bernardino and Los Angeles since both counties
must take their own separate but coordinated actions."