Glastonbury just got less fun. And less flammable.

A new Policing & Crime Act has gone into effect today making the possession and use of flares and pyrotechnics at music festivals illegal in England and Wales, NME reports.

The move echoes recent laws banning pyrotechnics at sporting events and follows similar guidelines. Festival goers in violation of the law could receive a fine or up to three months in jail.

As defined by solicitor Alex Chapman in a blog post, banned pyrotechnics are defined as “an article that contains explosive substances, or an explosive mixture of substances, designed to produce heat, light, sound, gas or smoke, or a combination of such effects, through self-sustained exothermic chemical reactions.” Matches are exempt from the law, despite fitting the description.

Chapman also points out that the law differs from sporting events since crowds are not monitored on cameras (as they are at football games) and it’s difficult to make an arrest in the midst of a festival crowd. Most issues (and possible arrests) with fireworks will take place at security checkpoints.