Except as described in Sec. 712.25, at the time a chemical substance is listed in Sec. 712.3, the following persons must submit the ``Manufacturer's Report--Preliminary Assessment Information'' (as described in Sec. 712.28) for each plant site at which they manufactured or imported the chemical substance during the reporting period specified in Sec. 712.30:
(a) Persons who manufactured one or more of the chemical substances listed in Sec. 712.30 for commercial purposes.
(b) Persons who imported in bulk form one or more of the chemical substances listed in Sec. 712.30 for commercial purposes.