42 CFR § 84.36
Delivery of changed or modified approved respirator
June 11, 2020
An approved respirator for which a formal certificate of modification has been issued shall be delivered, with proper markings and containers, by the applicant to the National Personal Protective Technology Laboratory, as soon as it is commercially produced.
[60 FR 30355, June 8, 1995, as amended at 80 FR 3907, Jan. 26, 2015]