Now that's the first time I've ever heard the PCA described as "moderate" by anyone. I think we are conservative by any measure.
Also, the PCA Book of Church Order declares that all property of a PCA member church is owned solely by that local church, and is not the property of the denomination itself or the church's local presbytery. This rule was established at the PCA's founding after so many churches had to forfeit their property to PCUSA when they left to form (or subsequently join) the PCA. By its own rules, the PCA cannot hold hostage the property of any member church that wishes to leave. This makes for a very healthy check on the conduct of our denomination.
It’s been a while since I’ve read the rules, and I was generalizing from the specific. Always a Marine is right on this - the only PCA requirement is that the withdrawal from the denomination be done in compliance with local civil law.