The existing FTAs can be very complicated to use compared to RCEP. Businesses with global supply chains might face tariffs even within a FTA because their products contain components that are made elsewhere. A product made in Indonesia that contains New Zealand parts, for example, might face tariffs elsewhere in the ASEAN free-trade zone. Under RCEP, parts from any member nation would be treated equally, which might give companies in RCEP countries an incentive to look within the trade region for supplies. It means that a table made with New Zealand wood, Japanese bolts, and steel legs from China can be sold in Thailand or Indonesia under the same rules of origin certification, reducing compliance costs for businesses and incorporating New Zealand exporters into these supply chains.