This present, revised, version of the Guidelines on Good Labelling Practice for Pesticides targets pesticide regulatory authorities, primarily in developing countries and countries with economies in transition, which have to define or revise national pesticide labelling requirements. The guidelines aim also to assist pesticide registration authorities in reviewing the design and contents of (draft) pesticide labels. Other stakeholders, such as pesticide industry and civil society groups, may also find the guidelines useful for writing or evaluating pesticide labels. The guidelines have been brought in line with the GHS, and where the GHS allows for (national) interpretation of its provisions, these guidelines provide specific options relevant to pesticide labelling.