The Montreal Protocol was signed on September 16, 1987, in Montreal, Canada. The focus of the Montreal Protocol is the control of production and consumption of bulk Ozone Depleting Substances. (Consumption is defined as production + imports - exports).
The link to the instrument above is a link to the consolidated text of the protocol i.e. the text including adjustments and amendments. The CELEX number 21988A1031(02) refers to the original protocol text in CELEX: https://eur-lex.europa.eu/legal-content/EN/TXT/?qi...(02)