This article deals with the formalization and modeling of legislative processes in healthcare. It emphasizes the importance of cooperation between architects, implementers, and users of information systems from the very beginning of their development. It highlights the pitfalls of creating information systems for public administration, which require the incorporation of a precise description of the processes used in legislation. Using the example of our own experience with solving the issue of ePrescription and creating legislation for the digitization of vaccination records, it shows the importance of using visual simulation methods and tools to facilitate mutual understanding between healthcare professionals, legislators, and software developers, for early detection of errors, and for significantly shortening the legislative process.