On September 14, 2017, the NRC issued a Notice of Violation to Coastal Wireline Services, Inc., (CWSI) for a Severity Level III violation. The violation involved the failure to file NRC Form 241, "Report of Proposed Activities in Non-Agreement States," at least three days prior to engaging in licensed activities within NRC jurisdiction, as required by 10 CFR 150.20. Specifically, between May 16 and 20, 2017, and on approximately the same dates in May 2016, CWSI, a licensee of the State of Texas, used iodine-131 within NRC jurisdiction without filing the required documentation with the NRC.