ISM-0025 Removed History Priority should Nov 2018 Removed Removed to ensure a focus on CISOs as the authority for all cyber security matters within organisations. 2017 Agencies should maintain an email address for their ITSA in the form of ITSA@agency. 2015 Agencies should maintain an email address for their ITSA in the form of ITSA@agency. 2010 Agencies should maintain an email address for their ITSA in the form of ITSA@agency.gov.au orITSA@agency.state.gov.au. 2008 Agencies must maintain an email address for the ITSA in the form of ITSA@agency.gov.au for Australian Government agencies, or ITSA@agency.state.gov.au for state agencies.