Each shipment valued at $2,500 or less which is to be delivered by the United States Postal Service, pursuant to § 145.12(b), will not be released from CBP custody unless a single transaction or continuous bond containing or meeting the bond conditions set forth in § 113.62 of this chapter has been transmitted to CBP pursuant to part 113 of this chapter, and has been secured by an approved corporate surety, or cash deposits as provided for in § 113.40 of this chapter.