Section 144A(1) in The Central Goods and Services Tax Rules, 2017
(1)Where the person transporting any goods or the owner of such goods fails to pay the amount of penalty under sub section (1) of section 129 within fifteen days from the date of receipt of the copy of the order passed under sub-section (3) of the said section 129, the proper officer shall proceed for sale or disposal of the goods or conveyance so detained or seized by preparing an inventory and estimating the market value of such goods or conveyance:Provided that where the detained or seized goods are perishable or hazardous in nature or are likely to depreciate in value with passage of time, the said period of fifteen days may be reduced by the proper officer.