of, pertaining to, or involving two states, esp. of the U.S.: a bistate water commission. · of, pertaining to, or involving the area where two states adjoin: Three million people work in the bistate area. Found on https://www.infoplease.com/dictionary/bistate
1) Like some port authorities 
of, pertaining to, or involving two states, esp. of the U.S.: a bistate water commission. · of, pertaining to, or involving the area where two states adjoin: Three million people work in the bistate area.