Thanks for the info.
I was able to talk to both Wavian and Atlantic British's California people this am. Both were able to confirm that green is good to go. People who have had problems in the past were trying to put gasoline in a yellow-painted (diesel) NATO can.
Wavian is out of stock on 5 gallon cans until next week, when they will have more than 200 coming in and will be updating their website. Their cans go for $79.99 each, which includes CARB-compliant the spout ($23.99). I asked if I can buy cans without spouts, but that is a no go from them. They do have a storefront in Paradise, California for anyone within driving range. They also do free shipping for Jerry can orders if you are not.
They have been trying to get Amazon to stop blocking orders to California, but Amazon has so far been uncooperative. These cans and spouts were specifically designed to meet all CA and recent Federal requirements and are legal for use and sale in all 50 states.
Wavian recommended that if I don't want a spout for every can, which I don't, I can save some money and they still make their's by buying Wavian cans from another dealer who will ship to CA.
So... Talked to Atlantic British and they confirmed that they do ship Jerry cans to (within) California. I also confirmed that their Jerry cans are Wavians and always are - they don't use other sources, so you know what you're getting. They will not ship non-compliant spouts, so don't include a spout in your order. But, they just now started carrying the Wavian/CARB spout for the same price as Wavian, but without free shipping. Their sale price on cans alone, plus cheapest UPS shipping rate, and sales tax since they have a CA shop comes out to $54.50/can. Expensive, but basically $101.96 less than four from Wavian directly, though need to factor in a spout that you will need to order from Wavian since I have not found anyone who will ship one to CA and AB is not yet carrying the CARB-spout on its own.
If you want to make filling/transfers easier, get a Super Siphon or similar, but be sure to have at least one Wavian Safety Spout in possession to make the cans CA and US compliant if one is concerned about that.
Bottom line for TLDR:
Green is good throughout US if using a Jerry/NATO can. Needs to be red if using for commercial purposes.
CARB-compliant spout is what makes Jerry/NATO cans meet federal and CA laws.
Can get CARB-compliant "safety" spout from Wavian directly from store in Paradise, CA for $23.99 or shipped anywhere from there including CA.
Can buy cans with CARB spouts for $79.99 from Wavian (free shipping, but factor in sales tax if in CA)
Or can buy Wavian cans (confirmed as Wavian) sans spouts from Atlantic British as singles or four packs. $39.95 on sale ($54.50 including shipping and tax). Will ship to California.
Got my order confirmation from Atlantic British and will update when shipped just in case the state takes out the UPS man with a surplus Apache attack chopper for transporting green Jerry cans.
That was a long run for a short slide, but I want to feel like a free bird and possess cans that can do this:
Can your gas can do this? | Wavian USA