Excerpt from article:

The US is considering the first revision in almost 20 years to the list of workers' rights that African and other developing countries must respect in order to sell their goods duty-free into the US
market.

The US Senate is likely to approve next week a revision to the 25-year-old Generalised System of Preferences that will for the first time require beneficiary countries to prohibit discrimination with respect to employment and occupation.

The International Labour Organisation adopted that language in 1998 as part of its core labour standards, but it has not been reflected yet in any US trade preference schemes...