(1) Type 1 hazardous substance is that of which the production, import, export, or having in possession must comply with the specified criteria and procedures.
(2) Type 2 hazardous substance is that of which the production, import, export, or having in possession must first be notified to the authority and must also comply with the specified criteria and procedures.
(3) Type 3 hazardous substance is that of which the production, import, export, or having in possession must obtain a permit.
(4) Type 4 hazardous substance is that of which the production, import, export, or having in possession is prohibited.