Data centers; Data Center Decommissioning Act; proper decommissioning; Oklahoma Corporation Commission; financial assurance; effective date.

HB 4194, the Data Center Decommissioning Act, requires owners of large data centers (100+ MW facilities) in Oklahoma to cover all costs for safely shutting down and restoring sites when operations end. Owners must provide financial assurance (like bonds or escrow funds) before construction to cover decommissioning, environmental cleanup, and site restoration, which must be completed within 12 months of closure. The law mandates removal of all infrastructure (buildings, equipment, hazardous materials) and land restoration to pre-construction conditions, with the Oklahoma Corporation Commission enforcing compliance. The bill takes effect November 1, 2026.