For the European market, CE Marking is essential, specifically compliance with EN 16228 (Drilling and foundation equipment safety). For the U.S. market, ensure the engine meets EPA Tier 4 Final or Euro Stage V emission standards to avoid customs seizure. Additionally, verify that the manufacturer holds ISO 9001:2015 for quality management and that the rig includes safety features like emergency stop buttons, protective cages, and ROPS/FOPS (Roll-Over/Falling Object Protective Structures) certified cabins.