Emerald spire Land Rush Boon Question

[Mad Gene Vane]

I have played four modules of the Emeraldspire Super Dungeon so far. When I first got the Land Rush Boon I did not have enough Prestige to buy land. I now have Prestige to buy two plots.

My question is can I retroactively buy land using an earlier character chronicle sheet or do I have buy one plot now and wait to run another module to buy more plots?

[Covert Operator]

It does have a "date" section, I say that strongly implies that you can retroactively buy.