Security is required by Customs to ensure that obligations deriving from a particular
procedure will be fulfilled. This is essential, for example, where duties and taxes are deferred
or where goods are provisionally released to the declarant pending final clearance. Provisional
release may also be based on a provisional declaration or pending the production of certain
documents which would permit a concessional rate of duties and taxes. The cases enumerated
in national legislation will normally specify the range of situations where Customs require a
security and the conditions under which such security will be required. The obligations to
Customs may be broad and general or they may be specific.