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)
Convention on the Rights of the Child (32)
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)
Universal Declaration of Human Rights (23)