16. If you promise part of your family's land to me, its value must be determined by the amount of seed needed to plant the land, and the rate will be ten pieces of silver for every twenty kilogrammes of seed.
17. If this promise is made in the Year of Celebration, the land will be valued at the full price.
18. But any time after that, the price will be worked out according to the number of years before the next Year of Celebration.
19. If you decide to buy back the land, you must pay the price plus an additional twenty per cent,
20. but you cannot buy it back once someone else has bought it.