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Press Release

UNISOURCE ENERGY CHOOSES FISCHER'S IDENTITY MANAGEMENT SUITE TO ADDRESS SOX, FERC COMPLIANCE

Selection Follows Year-long Evaluation of Nine Identity Management Solutions

Naples, FL (September 18, 2006) -- Fischer International, thought leaders in Identity Management, today announced that UniSource Energy (NYSE: UNS) has selected Fischer Identity Suite to satisfy the identity-related compliance requirements of Sarbanes-Oxley (SOX), Federal Energy Regulatory Commission (FERC), plus emerging regulations. Fischer's advanced provisioning architecture was chosen to automate and consolidate UniSource's current paper-based provisioning processes to deliver improved business efficiency, increased productivity across multiple departments, automated compliance, and rapid response to audits.

"The drivers for Identity Management at UniSource Energy Corporation were SOX and FERC compliance. But the time and productivity enhancements due to the automation are significant," says Adam Freden, Senior IT Security Specialist, UniSource Energy. The company currently uses paper-based processes for requesting, approving, and provisioning access to network resources, phones, and physical areas via badge readers for employees and contractors.

Automation and Auditability are Keys to Compliance and Productivity Gains
UniSource selected Fischer Identity Suite to create an automated provisioning environment to control, approve, audit, and enforce access to network resources, badge-enabled areas, and physical assets. Event-driven provisioning and deprovisioning will be triggered by business events in authoritative systems, such as HR and Active Directory. Self-service provisioning will also be deployed, providing end-users with a single, intuitive Web page for requesting new, updated, or revoked access to resources. Ongoing compliance will be enabled through Fischer's ability to validate and enforce Segregation of Duties in real time, discover and remediate entitlement violations on connected systems, and enable Data Conservators to monitor which employees and contractors have access to their sensitive resources. Because all provisioning events are recorded in Fischer's consolidated audit database, UniSource Energy will also be able to quickly, easily, and fully respond to requests from auditors, such as "Who had access to what, when, and who approved it?"

UniSource Energy is also extending their automated provisioning environment to mobile users to better ensure compliance and fast access to resources. Fischer's mobile "iFly" solution will allow Data Conservators, Managers, Supervisors, and other "approvers" to process provisioning requests directly from their PDAs. UniSource Energy will use iFly to ensure that provisioning requests are processed without delay and by the best qualified person, no matter the person's location.

Choosing the Best Identity Management Solution: No Easy Task
Fischer's selection followed a year-long evaluation conducted by UniSource Energy's IS Security department. Nine vendor solutions were evaluated, including those from identity and database vendors already in-house, new IdM players, and custom-built solutions. Some of the determining factors that led to Fischer's selection were:

• Simplicity: Ease of use for both end users and administrative staff
• Amount of required customization
• Ability to connect to all required systems
• Workflow capabilities
• Application platform configuration
• Project management philosophy

"We are extremely pleased to have UniSource Energy as a customer," said Reneé Bacherman, President and CEO of Fischer International. "UniSource Energy is a company of excellence and is dedicated to generating value for their customers and shareholders. Being selected after such a thorough analysis underscores the level of value organizations are seeking in an Identity Management solution, and the level of value we provide."


About UniSource Energy
UniSource Energy's primary subsidiaries include Tucson Electric Power, which serves approximately 385,000 customers in southern Arizona, and UniSource Energy Services, provider of natural gas and electric service for approximately 234,000 customers in northern and southern Arizona. For more information about UniSource Energy and its subsidiaries, visit uns.com.

About Fischer International
Fischer International was founded in 1982 by Addison Fischer, a security visionary whose many accomplishments are recognized globally. Headquartered in Naples, Florida, Fischer International has a distinguished history of innovation and thought leadership in the security industry. Fischer continues this tradition by being the first to deliver the next-generation of Identity Management. The solution, Fischer Identity Suite, is built upon DataForum™, Fischer’s standards-based provisioning, approval, and compliance engine. By design, the engine is an integration technology as Fischer recognized that integration is the lifeblood of enterprise Identity Management. Additionally, compliance is organically incorporated throughout because compliance must be part of the DNA in any Identity Management solution. Like all Fischer solutions, the Fischer Identity Suite will stand the test of time. For additional information, please visit www.FischerInternational.com

This news release contains forward-looking information that involves risks and uncertainties, that include, but are not limited to: changes in accounting standards; the outcome of regulatory proceedings; the ongoing restructuring of the electric industry; regional economic and market conditions which could affect customer growth and the cost of fuel and power supplies; changes to long-term contracts; performance of TEP's generating plants; the weather; changes in asset depreciable lives; changes related to the recognition of unbilled revenue; the cost of debt and equity capital; and other factors listed in UniSource Energy's Form 10-K and 10-Q filings with the Securities and Exchange Commission. The preceding factors may cause future results to differ materially from outcomes currently expected by UniSource Energy.

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Media Contact:

Dennis McDermott
Chief Marketing Officer
Fischer International
(239) 643-1500
dmd@fischerinternational.com