I can answer this.
Manufacturers will be required to add that to the manuals as a requirement since it will be part of the standards.
This walking unassisted has been in the Canadian curriculum for awhile, but we haven't been able to tell parents it as anything more than a guideline/recommendation because no manufacturer required it and it could only be enforced by a province as a proper use thing... meaning we could tell parents, but there was no "law" to back it up and most parents really don't consider something to be a requirement unless there's a law to back it up... Kind of the way that many provinces 1yr is only enforceable through proper use which means that the person giving the ticket needs to know the exact requirement of the manufacturer at the time the seat was made - Britax seats didn't have a min 1yr old to ff for quite awhile for example, so in a province like AB it would be legal to ff a 20lb 5 month old in a MA made back in 2004. As we know though, legal doesn't equal safe.
It think it will delay some kids going ff'ing provided parents take the time to read the manual and follow it. How much will really vary though because average walking age for girls is 13 months with the average for boys being younger than that. But for all the kids who are on the longer side of average, they'll rf longer. :thumbsup:
I'm looking forward to those 2 extra lbs. Right now, many parents who have a kid bordering on 20lbs and just turning 1 will buy a seat with a 20lb min to forward face so that they can turn right on the first birthday rather than having to wait another 2lbs if they bought another seat. It makes me cringe every time... 2lbs for kids on the light side could mean another 4 to 6months.