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Federal Register / Vol. 86, No. 220 / Thursday, November 18, 2021 / Rules and Regulations
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method in 7.18. However, these sections were not included in the summary list of requirements that apply to a combination unit of a car seat on a stroller in Section 6.6.1. ASTM F83321
now adds references to Section 6.7.1
and Section 6.10, as well as their corresponding test methods, to the list of requirements in Section 6.6.1. Section 6.7.1 applies to a combination unit of a car seat on a carriage, stroller, or convertible carriage/stroller and Section 6.10 applies to a combination unit of a rear-facing car seat on a stroller or convertible carriage/stroller. Staffs review showed that the additions to the list of requirements that apply to a combination unit of a car seat on a stroller in Section 6.6.1 is neutral with respect to safety and does not affect the safety of carriages and strollers, because there are no changes to the requirements, test methods, or category of product to which they apply. This addition simply restates the requirements with which a combination unit of a car seat on a stroller must conform. Based on staffs assessment, the Commission concludes that the addition of the references is neutral to the safety of carriages and strollers.
Addition of Parking Brake Mechanism Test Methods ASTM F83319 section 6.1.3 specifies that each parking brake shall be constructed so that it cannot be disengaged by the child within the unit when the child is secured in the unit in accordance with the instructional literature. ASTM F83321 replaces this text and adds three alternative test methods in new sections 6.3.1.1, 6.3.1.2, and 6.3.1.3, for evaluating the parking brake release mechanism for each seating position of the product as follows:
Section 6.3.1.1: Each parking brake mechanism is outside of the access zone, which is defined as: The volume above the seat within a 21.7-inch radius from the mid-point of the junction line on the uncompressed upper surface of the seat unit and extending 21.5 inches to each side as shown in Figure 7 of ASTM F83321 and a 2-inch band extending inward from each side of the seat/leg rest edge and downward for 5.9
inches from the uncompressed upper surface of the seat as shown in Figure 8 of ASTM F83321. The space located behind the backrest is excluded from the parking brake access zone for singleoccupant strollers but is included for multi-occupant product configurations if it enters another parking brake access zone.
Section 6.3.1.2: The parking brake release mechanism consists of one
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single-action release mechanism that shall not be released when a force of 10
lbf 45 N or a torque of 3 lbf-in. 0.34
Nm is applied directly to the release mechanism in the direction tending to release it.
Section 6.3.1.3: The parking brake release mechanism is a double-action release mechanism, which is defined in ASTM F83321 as, a release mechanism that requires either two consecutive actions, the first of which must be maintained while the second is carried out, or two separate and independent single-action locking mechanisms that must be activated simultaneously to fully release.
Staffs review of ASTM F83319, shows that existing section 6.1.3, which provides that each parking brake shall be constructed so that it cannot be disengaged by the child within the unit lacks specificity and fails to provide a test protocol or evaluation method. The assessment of whether a child can disengage the parking brake is currently left up to the testing laboratorys test personnel discretion, which could result in a lack of consistency and repeatability of testing between testing laboratories. Although staff is not aware of any incidents involving the child disengaging the parking brake, the potential for a child to disengage the parking brake is a foreseeable hazard. To address this hazard, ASTM F83321
adds a test method that includes a defined access zone, a specific force and torque, and an evaluation of the mechanism that is based on similar testing used in other standards.
Staffs assessment of section 6.3.1.1
shows that this test improves the safety of the standard by defining an access zone, and accounting for products with multiple seats that may provide easier access to the parking brake mechanism.
Staffs assessment of section 6.3.1.2
shows that this test improves safety by adding a force and torque requirement where there was none previously.
Finally, staffs review of the section 6.3.1.3 shows that although the specific reference to a double-action release mechanism was added in this section, the definition for a double-action release mechanism has been in existence since the ASTM F83313a version of the standard. Staffs assessment shows that the addition of this reference in this section improves safety by specifying the basis for evaluating the parking brake system. Based on staffs assessment, the Commission concludes that the addition of parking braking mechanism test methods improves the safety of carriages and strollers.

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2. Non-Substantive Changes ASTM made minor formatting changes to the ASTM F83321
including: 1 Renumbering figures to account for two new parking brake figures Figures 7 and 8 of ASTM F833
21, 2 addition of hyphens to compound adjectives, 3 addition of units to the first value in range, and 4
revision of punctuation and spacing.
The Commission finds that all the nonsubstantive changes made in ASTM
F83321 are neutral regarding safety for carriages and strollers because they are editorial in nature.
Based on CPSCs review of ASTM
F83321, the Commission will allow the revised standard to become the mandatory standard for carriages and strollers, without modification. This direct final rule updates 16 CFR part 1227 to incorporate by reference the revised voluntary standard, ASTM
F83321.
C. Incorporation by Reference Section 1227.2 of the direct final rule incorporates by reference ASTM F833
21. The Office of the Federal Register OFR has regulations regarding incorporation by reference. 1 CFR part 51. Under these regulations, agencies must discuss, in the preamble to a final rule, ways in which the material the agency incorporates by reference is reasonably available to interested parties, and how interested parties can obtain the material. In addition, the preamble to the final rule must summarize the material. 1 CFR 51.5b.
In accordance with the OFR
regulations, section B. Revisions to ASTM F833, of this preamble summarizes the major provisions of ASTM F83321 that the Commission incorporates by reference into 16 CFR
part 1227. The standard is reasonably available to interested parties. Until the direct final rule takes effect, a read-only copy of ASTM F83321 is available for viewing on ASTMs website at: https
www.astm.org/CPSC.htm. Once the rule takes effect, a read-only copy of the standard will be available for viewing on the ASTM website at: https
www.astm.org/READINGLIBRARY/.
Interested parties can also schedule an appointment to inspect a copy of the standard at CPSCs Division of the Secretariat, U.S. Consumer Product Safety Commission, Room 820, 4330
East West Highway, Bethesda, MD
20814, telephone: 3015047479; email:
cpsc-os@cpsc.gov. Interested parties can purchase a copy of ASTM F83321 from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West
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