R9-7-531. Security

During each radiographic operation, the radiographer or radiographer’s assistant shall maintain continuous direct visual surveillance of the operation to protect against unauthorized entry into a high radiation area, as defined in Article 1, unless: 1. The high radiation area is equipped with a control device or an alarm system as prescribed in R9-7-420(A), or 2. The high radiation area is locked to protect against unauthorized or accidental entry.