The Final Rule on Security Standards was issued on February 20, 2003. It took effect on April 21, 2003, with a compliance date of April 21, 2005, for most covered entities and April 21, 2006, for "small plans". The Security Rule complements the Privacy Rule. While the Privacy Rule pertains to all Protected Health Information (PHI) including paper and electronic, the Security Rule deals specifically with Electronic Protected Health Information (EPHI). It lays out three types of security safeguards required for compliance: administrative, physical, and technical. For each of these types, the Rule identifies various security standards, and for each standard, it names both required and addressable implementation specifications. Required specifications must be adopted and administered as dictated by the Rule. Addressable specifications are more flexible. Individual covered entities can evaluate their own situation and determine the best way to implement addressable specifications. Some privacy advocates have argued that this "flexibility" may provide too much latitude to covered entities. Software tools have been developed to assist covered entities in the risk analysis and remediation tracking. The standards and specifications are as follows: