The Right to just and favorable work conditions is explained in these documents:

Legally Obligating Documents
African (Banjul) Charter on Human and People's Rights (15)
International Convention on Elimination of All Forms of Racial Discrimination (5(e)(i))
International Covenant Economic, Social and Cultural Rights (7)

Standard Setting Documents
Beijing +5: Further Actions and Initiatives to Implement the Beijing Platform for Action (82)
Beijing Platform for Action (156)
Cairo Programme of Action (3.16)
UN Special Session on HIV/AIDS (UNGASS) Declaration of Commitment (49)
Universal Declaration of Human Rights (23)