On 29 January 2010 the Minister for Infrastructure announced changes to the Maritime Security Identification Card scheme. The proposed changes affected around 125,000 card holders and card issuing bodies. An adequate Business Cost Calculator was required to be prepared under previous Regulatory Impact Analysis requirements in operation before 1 July 2010, but was not prepared prior to announcement. Under requirements applicable at the time, where a proposal proceeds (either through the Cabinet or another decision maker) without an adequate RIS or quantification of compliance costs, the resulting regulation must be the subject of a post-implementation review within one to two years of implementation. As the regulatory costs of the amendment mainly related to compliance costs, a post-implementation review utilising the business cost calculator was prepared and assessed as adequate by the Office of Best Practice Regulation.