Estonia’s accession to the European Union on 1 May 2004 continue to produce changes in law. Provisions in the Treaty on European Union stipulate the principle of equal treatment for all residents of the European Union, including freedom of establishment for companies, and equal opportunities for enterprise.

On 28 June 2004, the Estonian Parliament passed the Telecommunications Act Amendment Act.

The case of Mazeikiu Nafta Trading House concerns the application of the Employment Contracts Act (ECA) to employment contracts agreed before the ECA came into force (i.e before 1 July 2009).

On 28 June, the Estonian Parliament passed the Competition Act and Penal Code Amendment Act. The Act is aimed at bringing the Competition Act into compliance with current European Union competition rules.

On 8 December 2004, the Riigikogu adopted a new Insurance Activities Act.Once again, accession required the new law, as the regulation of insurance activity, insurance intermediation, and supervision thereof is covered by European Union directives.