20 The existing chapter 14 is replaced by the following:
21 Footnote to be added in paragraph 2.1.1.4 of chapter 3
In paragraph 2.1.1.4, after the second sentence, a footnote is added as follows:
"* Refer to the recommendations of the International Electrotechnical Commission, in particular publication IEC 60079, Electrical Apparatus for Explosive Gas Atmospheres."