Yilan County residents, backed by civic groups, on Wednesday filed an administrative lawsuit to overturn the environmental impact assessment (EIA) approval for the Yilan-bound high-speed rail (HSR) extension.They filed the lawsuit after the Executive Yuan on Sept. 11 rejected an administrative appea. Add TT as Preferred Source Yilan County residents, backed by civic groups, on Wednesday filed an administrative lawsuit to overturn the environmental impact assessment (EIA) approval for the Yilan-bound high-speed.