ISO 26261-2:2017 specifies requirements for the construction, performance and protective packaging of Category 4 fireworks, as listed in ISO 26261‑1.

ISO 26261-2:2017 does not apply for articles containing pyrotechnic compositions that include any of the following substances:

- arsenic or arsenic compounds;

- polychlorobenzenes;

- lead or lead compounds (except for igniters);

- mercury compounds;

- white phosphorus;

- picrates or picric acid.

ISO 26261-2:2017 does not apply for theatrical pyrotechnic articles which are designed for indoor or outdoor stage use, including film and television productions or similar use.