E/C.12/GC/18 page 14 2 Commission on Human Rights, eleventh session, agenda item 31, A/3525 (1957). 3 ILO Convention No. 29 concerning Forced or Compulsory Labour, 1930, article 2, paragraph 1; see also paragraph 2. ILO Convention No. 105 concerning the Abolition of Forced Labour, 1957. 4 Only some of these topics feature in articles 2.2 and 3 of the Covenant. The others have been inferred from the practice of the Committee or from legislation or judicial practice in a growing number of States parties. 5 See general comment No. 3 (1990), The nature of States parties’ obligations, paragraph 12. 6 See general comment No. 16 (2005) on article 3: the equal right of men and women to the enjoyment of all economic, social and cultural rights, paragraphs 23-25. 7 See the Convention on the Rights of the Child, 1989, article 32, paragraph 1, reflected in the second preambular paragraph of the Optional Protocol to the Convention on the Rights of the Child on the sale of children, child prostitution and child pornography. See also article 3, paragraph 1, of the Protocol, on forced labour. 8 See general comment No. 6 (1995) on the economic, social and cultural rights of older persons, paragraph 22 (and paragraph 24 on retirement). 9 See general comment No. 5 (1994) on persons with disabilities, including other references in paragraphs 20-24. 10 See ILO Convention No. 159 concerning Vocational Rehabilitation and Employment (Disabled Persons), 1983. See article 1, paragraph 2, on access to employment. See also the Standard Rules on the Equalization of Opportunities for Persons with Disabilities, proclaimed by the General Assembly in it resolution 48/96 of 20 December 1993. 11 See general comment No. 3 (1990) on the nature of States parties’ obligations, paragraph 1. 12 Ibid, para. 2. 13 Ibid, para. 9. 14 Ibid, para. 9. 15 If offered on a voluntary basis. On the question of the work of prisoners, see also the Standard Minimum Rules for the Treatment of Prisoners and article 2 of the ILO Convention (No. 29) concerning Forced or Compulsory Labour. 16 17 See Convention on the Rights of the Child, article 31, paragraph 1. See ILO Convention on the Worst Forms of Child Labour, article 2, paragraph 7, and the Committee’s general comment No. 13 on the right to education.