As far as I know Alaska is still in the US. We smart pig our lines every five years, to report the line operating conditions and physical condition the national pipeline database. I'll bet BP petitioned for exemption based on the fact that they're not a common carrier and the application of huge amounts of cash in the right places.Crude oil pipelines are hardly low risk - especially at the head of the production chain - the produced waters at the wells are extremely corrosive and anaerobic bacteria can puncture a pipeline in a couple of years - everyone knows this. Everyone, including BP - they just tried to get away with as much as possible.