The purpose of this Module is to provide the CBB's Directive concerning trading, dealing, advisory services, portfolio management services in accepted crypto-assets as principal, as agent, as custodian and as a crypto-asset exchange within or from the Kingdom of Bahrain. The key requirements relevant to these activities are outlined in this Module while the licensees are also subject to other relevant Modules of the CBB Rulebook Volume 6. This Directive is supported by Article 44(c) of the Central Bank of Bahrain ('CBB') and Financial Institutions Law (Decree No. 64 of 2006) ('CBB Law').