(a) * * *
(2) * * *
(ii) Industrial, commercial, and consumer activities. Requirements as specified in Sec. 721.80(k) (manufacture, processing, or use of the PMN substance if the particle size is less than 10 microns).
(b) * * *
(1) Recordkeeping. Recordkeeping requirements as specified in Sec. 721.125(a), (b), (c), (f), (g), (h), and (i) are applicable to manufacturers and processors of this substance.
* * * * *