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Thank you for your input and feedback on this. Upon checking other users' request and the existing features of the fillable PDF, it seems that conditions or business rules are not possible right now.
I will escalate this to our developers so that they can add you up to the list of people who are looking for this feature. Unfortunately, I'm unable to provide a time frame regarding this.
But rest assure that we'll update you when we hear any news or progress.
First of all thanks for your feedback and participation, i really appreciate it. Transferring conditions into PDF forms is a hard work and even if we implement that it will not be as smooth as in web forms, besides some conditions are impossible to put. In a nutshell we are not planning to put conditions into PDFs in near time.