Structured sanitary preparation to mass gatherings is based on the set of instructions and legal requirements which are different for different jurisdictions. In many countries special checklists are used for itemized scrutiny of the sanitary preparation to the event. Those checklists are present in two forms. One is relatively short list of legal requirements necessary for obtaining permit to organize mass gathering event. Another is much larger set of questions which contains itemized comprehensive review of activities advisable for effective organization of the event. It includes safety measures as well as logistic structure of effective organization. Polish legal bill on mass gatherings deals extensively with security measures, but sanitary supervision is left to Sanitary Inspection without any specifications of points to be checked and without clearly stated norms for sanitary infrastructure at the venues. The Authors stress the need for uniform instruction and checklist for use in scrutiny of sanitary preparation to mass gathering by State Sanitary Inspectors.