To ensure that the disposal company fully discharged its responsibilities, the contract explicitly provided for staged payments, and each time the contractor invoiced TaiPower it had to append copies of the export and import licenses and customs certificates for each capacitor, along with proof of them having been received by the final disposal site, and certificates of insurance for such risks as back freight, health and safety at work and the entire transport process.
為了確保清運廠商會負責到底，合約中明定分批付款，而且廠商每次請款，必須檢具每一具電容器的出入境許可與海關證明，以及進最終處置場的證明和退運、工安、運送過程等各項保險的保險證明。