It is going to be a difficult task. I looked through examples, and it seems that what they do is represent conditions set out in the law as a boolean expression that answers the question whether something is allowed or not (X is allowed if Y, Z and not W), and display it as a graph/AST. The problem though that the inputs to this expression are answers to non-trivial questions, like "Excudable Educational Assistance" or "Has Felony Drug Conviction" without specifying what exactly is considered a "drug conviction".