If the DTSC decides that, based on the public comments (which have closed and are now in the evaluation process), it needs to revise rulemaking "in any substantive manner," it will initiate another formal comment period to allow the USTMA to respond.
Otherwise, the DTSC will finalize its rulemaking package for the California Office of Administrative Law for review and approval.
As for industry impact, the regulatory process concerning 6ppd may begin on the West Coast, but it may not end there.
"The (Safer Consumer Products Regulation) applies to products sold in California," Amick said last month. "However, the tire industry is a global industry and seeks flexibility to ship tires globally.
"Thus, any potential decision by DTSC regarding potential alternatives (to 6ppd) would be expected to be adopted globally."
The DTSC is looking at completing the process in 2023 with an effective date of listing regulations by July 1, 2023.
Once any such regulatory standards are issued for 6ppd (if any), the USTMA can select either an abridged timeline (about 315 days) or a lengthier timeline (up to two years) in an alternatives search for 6ppd.
"Once the listing regulations are effective, it is up to the regulated entities (the tire manufacturers) to decide which course they want to take," Palmer said last month. "We will work with them regardless which path they chose."
Informed by science, Palmer said the analysis will compare 6ppd and alternatives, with a goal of identifying a safer alternative.
"We know what manufacturers do ... they innovate," Palmer said. "This is a very complex process, and we rely on the manufacturers to assist in that process."
With 56 manufacturing locations across 17 states, corporate members of the USTMA include Bridgestone Americas, Continental Tire the Americas, Giti Tire USA Ltd., Goodyear, Hankook Tire America, Kunho Tire USA Inc. Michelin North America Inc., Nokian Tyres, Pirelli Tire North America, Sumitomo Rubber North America, Toyo Tire Corp. and Yokohama Tire Corp.