The World Trade Organization (WTO) arbitrator’s decision, released 25 April 2017, in respect of DS381: US — Tuna II (Mexico), provided “Mexico may request authorization from the [Dispute Settlement Body] DSB to suspend concessions or other obligations […] at a level not exceeding USD 163.23 million per annum”. The dispute originally arises from the 2013 US tuna labeling policy (since modified and further challenged), which was used as the basis to assess the “level of nullification or impairment of benefits accruing to Mexico”.
For further information see here, and the reported decision here.