Take Article 11 of the Regulations on Handling Medical Accidents (hereinafter referred to as the Regulations) as an example. The content before the proviso in the Regulations is: "In medical activities, medical institutions and their medical staff shall truthfully inform patients of their illness, medical measures and medical risks. , and answer their inquiries in time ",this is to determine the patient's right to know by setting obligations to medical institutions and medical staff, and in the subsequent book. This means that the patient's right to know is not absolute. Medical institutions and their medical staff shall not "truthfully inform patients of their illness, medical measures, medical risks, etc." if medical behavior may cause adverse consequences to patients. The "proviso" here is stipulated as an exception to "knowing" and can be used as a legal reason against his right to know.
Therefore, the "proviso" in legal provisions is usually interpreted as the opposite of the content before "but".