On Friday, April 23, 2021, IFEZ signed a memorandum of understanding in April 2019 to extend economic cooperation and mutual exchanges with San Bernardino County, California. It came as San Bernardino County asked to benchmark the IFEZ Smart City Operation Center, which is of high interest at home and abroad. It was also signed in April 2019 when San Bernardino County Chairman Kurt Hagman, who visited IFEZ during his visit to Korea and signed a memorandum of understanding, succeeded in serving a second term from this year and hoped to continue cooperation with IFEZ.