sustenance by means of freely chosen or accepted work. Parties are required to take "appropriate steps" to safeguard this right, including technical and vocational training and economic policies aimed at steady economic development, and ultimately full employment. The right implies parties must guarantee equal access to employment and protect workers from being unfairly deprived of employment. They must prevent discrimination in the workplace and ensure access for the disadvantaged. The fact that work must be freely chosen or accepted means parties must prohibit forced or child labour. The work referred to in Article 6 must be decent work. This is effectively defined by Article 7 of the Covenant, which recognises the right of everyone to "just and favourable" working conditions. These are in turn defined as fair wages with equal pay for equal work, sufficient to provide a decent living for workers and their dependants; safe working conditions; equal opportunity in the workplace; and sufficient rest and leisure, including limited working hours and regular, paid holidays. Article 8 recognises the right of workers to form or join trade unions and protects the right to strike. However, it allows these rights to be restricted for members of the armed forces, police, or government administrators. Several parties have placed reservations on this clause, allowing it to be interpreted in a manner consistent with their constitutions (e.g., China, Mexico), or extending the restriction of union rights to groups such as firefighters (e.g., Japan). Right to social security Article 9 of the Covenant recognises "the right of everyone to social security, including social insurance". It requires parties to provide some form of social insurance scheme to protect people against the risks of sickness, disability, maternity, employment injury, unemployment or old age; to provide for survivors, orphans, and those who cannot afford health care; and to ensure that families are adequately supported. Benefits from such a scheme must be adequate, accessible to all, and provided without discrimination. The Covenant does not restrict the form of the scheme, and both contributory and non-contributory schemes are permissible (as are community-based and mutual schemes). The Committee on Economic, Social and Cultural Rights has noted persistent problems with the implementation of this right, with very low levels of access. Several parties, including France and Monaco, have reservations allowing them to set residence requirements in order to qualify for social benefits. The Committee on Economic, Social and Cultural Rights permits