16 C.F.R. § 1700.15
To protect children from serious personal injury or serious illness resulting from handling, using, or ingesting household substances, the Commission has determined that packaging designed and constructed to meet the following standards shall be regarded as “special packaging” within the meaning of section 2(4) of the act. Specific application of these standards to substances requiring special packaging is in accordance with § 1700.14.
(b) Effectiveness specifications. Special packaging, tested by the method described in § 1700.20, shall meet the following specifications:
(B) Determination of need for metal or aerosol container—(1) Criteria. A product will be deemed to require metal containers or aerosol form only if:
(i) No other packaging type would comply with other state or Federal regulations,
(ii) No other packaging can reasonably be used for the product's intended application,
(iii) No other packaging or closure material would be compatible with the substance,
(iv) No other suitable packaging type would provide adequate shelf-life for the product's intended use, or
(v) Any other reason clearly demonstrates that such packaging is required.
(2) Presumption. In the absence of convincing evidence to the contrary, a product shall be presumed not to require a metal container if the product, or another product of identical composition, has previously been marketed in packaging using either a nonmetal package or a nonmetal closure.
(3) Justification. A manufacturer or packager of a product that is in a metal container or aerosol form that the manufacturer or packager contends is not required to comply with the SAUE requirements of § 1700.20(a)(3) shall provide, if requested by the Commission's staff, a written explanation of why the product must have a metal container or be an aerosol. Manufacturers and packagers who wish to do so voluntarily may submit to the Commission's Office of Compliance a rationale for why their product must be in metal containers or be an aerosol. In such cases, the staff will reply to the manufacturer or packager, if requested, stating the staff's views on the adequacy of the rationale.
(d) Restricted flow. Special packaging subject to the provisions of this paragraph shall be special packaging from which the flow of liquid is so restricted that not more than 2 milliliters of the contents can be obtained when the inverted, opened container is taken or squeezed once or when the container is otherwise activated once.
(Secs. 2(4), 3, 5, 84 Stat. 1670-72; 15 U.S.C. 1471(4), 1472, 1474)
[38 FR 21247, Aug. 7, 1973, as amended at 60 FR 37734, July 21, 1995]