19 C.F.R. § 10.136 Suspension of liquidation.
Title 19 - Customs Duties
Liquidation of an entry covering merchandise for which a declaration of intent has been made pursuant to §10.134 and any required deposit of duties made, shall be suspended until proof of use is furnished or the 3-year period allowed for production thereof has expired. [T.D. 71–139, 36 FR 10726, June 2, 1971]
Title 19: Customs Duties
PART 10—ARTICLES CONDITIONALLY FREE, SUBJECT TO A REDUCED RATE, ETC.
Subpart A—General Provisions
Rate of Duty Dependent Upon Actual Use
§ 10.136 Suspension of liquidation.

