Section 84.60 - Construction and performance requirements; general(a) The Institute shall issue approvals for the types of respirators described in subparts H through O of this part which have met the minimum requirements set forth for such respirators in this part.(b) In addition to the types of respirators specified in subparts H through L of this part, the Institute shall issue approvals for other respiratory protective devices not specifically described in this part subject to such additional requirements as may be imposed in accordance with § 84.63(c) .60 FR 30355, June 8, 1995, as amended at 77 FR 14192 , Mar. 8, 2012; 85 FR 20607 , Apr. 14, 2020