Restrict number of a certain game piece

Module Design
1

Hi,
I giving a try to create a module for Dual Powers.
I’m looking at the Monopoly module for ideas.
I’m wondering how they limit the number of Hotels to 12 in the module.
Thanks.

2

The easiest way is to put exactly 12 of them in the game, via an At-Start stack (or 12 at-start stacks). Don’t supply a way to delete one or create or clone one, don’t have one in a piece palette. Only supply a way to move/claim one.