Handlers shall implement the plant (site) risk prevention and response plan according to its contents; owners and transport handlers shall jointly implement the transport risk prevention and response plan according to its contents. Records shall be kept of the implementation of the accident prevention and rescue training, exercises, and education and awareness measures in the plan, and shall be preserved for three years for reference.Handlers and owners shall review their risk prevention and response plans once every two years, and shall report any changes for reference.Handlers and owners of toxic and hazardous concerned chemical substances shall submit a revised risk prevention and response plan to the competent authorities of the municipality, city or county for record if any of the following circumstances applies:I. The type of handled substances has changed.II. The manufacturing process has changed.III. The storage method or container that affects the response actions has changed.IV. The total handling quantity has changed, resulting in a quotient, calculated according to the attachment, greater than one.The changes prescribed in the preceding paragraph shall be reported within 30 days of the occurrence of the fact for the record. However, if the competent authority of the municipality, county or city agrees to extend the period of time, this limit shall not apply.Attachment：Total Handling Quantity Table of Toxic and Hazardous Concerned Chemical Substances Attributes.pdf