Chamber of Commerce Industry and Agriculture of Beirut and Mount Lebanon | 2,723 followers on LinkedIn. The Chamber of Commerce Industry and Agriculture of Beirut and Mount Lebanon (CCIA-BML) is a non-profit private organization working for the public benefit. The CCIA-BML was established in 1898 and is the largest of the four Lebanese Chambers that are regulated by Ministerial Decree No 36/67 enacted in 1967. Decree No 36/67 awarded the Lebanese Chambers the exclusive rights to the provision of services to business enterprises namely, the issuance of certificates of origin and the authentication of invoices and commercial documents.