Hi, 

I don't quite understand the requirements. However, if there is a section, where certain fields should be shown based on a condition, you can either implement it as a Visibility condition (an expression or a when rule) OR you can Circumstance the section (i.e. with the same name, in the same ruleset, same class). The latter allows you to add only fields applicable for that condition in the same section + circumstancing based on a single property or a template might help leverage these conditions (should they expand in the future).

Alternatively, (I do not recommend, however) is pre-setting the value to a property, so that when you enter the section, you have a concrete property holding what you would have held in a param. Then, using a visibility when rule, you can check against that concrete property instead of a param.property.

I hope this helps.

Instead of passing the section name to check the when condition, is it possible in your scenario to use the section include and mention the condition on it?