Additional Customs clearance chargers
Sometimes you have to be pragmatic either fly the parts out with an engineer with a completed low value customs clearance form and a pocket full of cash, or have a conversation with the customs agent locally about the additional inspection charges required to release the kit.
Its wrong, irritating and probably illegal locally and if you can plan for delays without interrupting progress then do so, but the cash amounts are normally so low they don't even appear as a blip on the project budget.