Nothing in this Part shall be construed to prohibit: any activity not specifically described in this Part; the transportation of radioactive materials used in basic academic research, medical research, or the diagnosis and treatment of patients; consumer uses of radioactive material for smoke detectors, light emitting watches or clocks, industrial radiography and tracer processes, and other similar incidental applications; direct activities of the federal government or its employees; and the transportation of radioactive materials to and through the Port of Baltimore. City Code, 1976/83, art. 3, §8 Ord. 92-015