Legal Limits (IMAGE) Norwegian Institute of Public Health Caption New legal limits in traffic for drugs other than alcohol : table showing the impairment based legislative limits and limits for graded sanctions for drugs other than alcohol, from Feb. 1, 2012. Credit Copyright: Norwegian Institute of Public Health Usage Restrictions With credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.