Prop 65 + CPSC + FTC Made in USA labeling, how do you flag at the SKU level?

Home & garden compliance is per-SKU and per-shipping-destination. The four headline regimes:

• California Prop 65, chemicals known to cause cancer or reproductive harm (formaldehyde in pressed wood, lead in metal coatings, BPA in some plastics, flame retardants in foam). California-bound shipments need a Prop 65 warning on PDP + checkout + product label. Per-SKU attribute prop_65_chemicals[] in Magento; Hyvä PDP renders the warning conditionally if destination = CA at cart.
• CPSC (Consumer Product Safety Commission), flammability standards (CFR 1633 for mattresses, ASTM F2057 for furniture tip-over), small-parts hazards on decor, lead/cadmium limits on metal goods. Compliance is the manufacturer’s responsibility but you need to capture certifications per drop-ship vendor. Custom admin grid for vendor cert tracking.
• FTC Made in USA, "Made in USA" claims require “all or virtually all” components US-made. If your product is "Designed in USA, assembled in Mexico", FTC will fine you for the wrong label. Per-SKU country_of_origin + made_in_usa_eligible attributes, rendered on PDP.
• FSC sustainability, Forest Stewardship Council certification for wood furniture and paper packaging. Per-SKU FSC chain-of-custody number. Increasingly required by retailers (Crate & Barrel, West Elm) and useful for sustainability-conscious DTC.

Magento pattern: per-SKU custom attributes for each compliance regime. PDP renders warnings conditionally. Checkout enforces destination-specific rules (Prop 65 banner for CA, etc.). Admin grid for vendor cert tracking. Quarterly audit by ops to catch new requirements.