"To revise the guidelines" means to make changes or updates to a set of rules or instructions that provide direction or advice on how to do something. Full definition
The start of 2016 saw anticipated revised guidelines in environmental health. (lawyer-monthly.com)
Past research has established the importance of revising guidelines over time to address advances in research and population - level changes in health risks. (sciencedaily.com)
Under revised guidelines, insurers are considering launching products to meet various needs in this regard --- child care, education and marriage expenses. (business-standard.com)