As a general rule on customs valuation, there are certain types of costs that should be added to the customs value. But sometimes the costs cannot be determined at the time of import (or at the time of import declaration). Thus, in 2016 the Indonesian Minister of Finance (MOF) issued MOF Regulation No. 67/PMK.04/2016 on Voluntary Declaration of Customs Value for Import Duty Calculation (“MOF Regulation 67“), which introduced ways to declare and pay those costs in the form of a voluntary declaration and voluntary payment mechanism.
Source Baker & McKenzie
