California Prop 65 + Conflict Minerals + RoHS flagging, how do you handle it on Magento?

Three compliance regimes that hit promo + merch sellers shipping into the US:

• California Prop 65, mandatory warning label on products containing any of ~900 listed chemicals (lead in PVC, phthalates, BPA in drinkware liners, etc.). Required warning: “WARNING: This product can expose you to chemicals including [chemical] which is known to the State of California to cause cancer…”. Civil penalty for violation: up to $2,500/day per product per buyer.
• Conflict Minerals (SEC Rule), if you sell to publicly-traded US companies, they ask you to certify your supply chain doesn’t use 3TG (tin, tungsten, tantalum, gold) from the DRC region. Common for tech promo products (chargers, USB drives, branded electronics).
• RoHS, EU electronics directive limiting lead, mercury, cadmium. Hits anything electronic shipped into the EU.

Magento layer:

• Product attribute prop_65_warning (text) holding the chemical-specific warning text per SKU. Renders at PDP, in cart, on PO confirmation, and on the shipping label / packing slip (Magento order email template).
• Shipping-address conditional rendering, show the warning only when ship-to includes a California address. Use a sales-rule observer.
• Conflict Minerals attribute conflict_minerals_status (free / non-3TG / unverified). Exposed in PO confirmation email for the corporate buyer’s compliance team.
• RoHS flag on EU store view; block non-RoHS-certified SKUs from EU checkout.

The PromoStandards EDI feeds (SanMar, Alphabroder) ship Prop 65 + Conflict Minerals + RoHS metadata per SKU as part of the ProductDataService response. One ingest, automatic compliance flagging.