This is the official title of the original European document that later became known as the Social Charter. It originated in the review of progress towards the target of completing the internal market by the end of 1992 in which the European Council referred to the equal importance of developing the social aspects of the single market. The European Commission then drew up a set of proposals for the introduction of a European Community Charter of Fundamental Rights of Workers (Social Charter). A modified version of these proposals was then approved by the European Council at its Strasbourg Summit, in December 1989, although opposition by the United Kingdom meant that only 11 of the 12 Member States signed the document. Subsequently, the Social Charter figured prominently in the discussions leading up to the Treaty on European Union, but persistent opposition from the United Kingdom prevented it from being included in the Treaty. Instead a Social Chapter complete with an opt-out arrangement for the United Kingdom was agreed, allowing the 11 to proceed with measures, notably on health and safety and worker consultation, to implement the Charter. The Labour Government elected to power in May 1997 agreed to sign the Charter shortly after taking office. Following this, the Treaty of Amsterdam removed the opt-out clause and incorporated the Social Chapter in the revised Treaty of Rome. Essentially, the Charter set out to codify in general terms what the European Community (EC) had already begun to do in the social sector, as well as introducing some new proposals. In emphasizing that the single internal market must benefit workers as well as employers, the Charter set out a code of practice that dealt with living and working conditions, freedom of movement of labour, collective bargaining, training, equal opportunities, gender equality, measures to protect underprivileged groups, and safety and health protection. Much of this was already the subject of EC directives and regulations. The European Commission wanted a further harmonization of practices that would bring them to the level of the best national practices currently in existence, and stressed the appropriateness of EC action where the desired goals could be more easily achieved within the EC, rather than at the national level. Since the Charter's adoption, many of the rights of workers contained in it have been incorporated into the Charter of Fundamental Rights proclaimed in 2000. See: Charter of Fundamental Rights of the European Union; Community Charter of the Fundamental Social Rights of Workers (Social Charter)