Oil from the well in which we have an interest in Williams County, North Dakota was first marketed in March, 2011. We didn't receive our first royalty check until the end of November. I asked the company (Continental Resources) for interest on the oil and gas sold during the months of March-June because these royalties were not received during the 150 day window as specified in the North Dakota Century Code. The company tells me that the clock actually started in August when the well was "released". I'm not sure what this term refers to. In any event, I'm curious whether anyone else has had a similar experience or can tell me when the clock should actually start.