It's a bit of an odd idea to keep the form behaving like it used to. Essentially it means you're keeping multiple versions of the same form around. This implies

It's a bit of an odd idea to keep the form behaving like it used to. Essentially it means you're keeping multiple versions of the same form around. This implies that you're ok developing workarounds for deprecated browser functionality Assuming that this is a hard requirement, I think you need to save the configs to a database table and the business rules to another table. It should be a simple join our two to get the config and the business rules for any user's form