Afterwards, the pistols were tested and retested. Patients who have an indeterminate test should be retested immediately. The chamber will need to be periodically retested. Pipe welding is often performed by specially licensed workers whose skills are retested periodically. Specimens with a reactive ELISA result are retested in duplicate. Production later resumed production when a performer was retested and it came back negative. However, unaltered items from the basic design need not be retested. These patients were also negative when retested for bacterial overgrowth. After being retested, Walsh was cleared of any wrongdoing and allowed to continue playing. His first sample, or A sample, was retested and again returned a positive result. The examiners retested Udall under closer scrutiny, and he was rejected. Meanwhile, Garand redesigned his bolt and his improved T1E2 rifle was retested. However, he later retested under Chuck Norris. He was retested in 1994 and passed the exam. The vehicle was redesigned and retested, and received a 5-star rating.