Cаl оwned а 100-аcre tract that was lоcated in the “Heavy Industry Zоne” on the outer edge of a small town. The town’s zoning ordinance provided that all types of industrial uses were permitted in this zone, while the town’s general plan encouraged “all efforts to develop new jobs in our community.” Cal constructed a facility on his land to reprocess radioactive fuel rods used in nuclear reactors. The facility created 20 new jobs when it began operation. Concerned about potential radiation leaks, local residents petitioned the town council to take action. The town attorney concluded that the facility was not a nuisance. The town council then adopted the following amendment to the zoning ordinance: “Uses that involve radioactive fuel rods from nuclear reactors will not be permitted in the Heavy Industry Zone.” What is the most likely reason that the amendment will not affect Cal’s facility?