Designation

http://www.foxnews.com/opinion/2017/08/16/time-to-end-north-korea-sanctions-merry-go-round.html

China must also restrict trade with Pyongyang. For example, North Korea’s ICBMs are carried on Chinese-made trucks; the Kim regime claimed the trucks were for the forestry ministry, and the UN has http://www.un.org/ga/search/view_doc.asp?symbol=S/RES/1718%20%282006%29 since 2006 the export of items for the Kim regime’s missile program.

China has notoriously flouted sanctions in the past and the communist party’s recent complaints about U.S. “moral arrogance” after the UNSCR vote doesn’t portend well for this round, either. U.S. secondary sanctions are what truly worry Beijing. The Trump administration needs to move forward now with more designations.

Second, the United States must take action to cut off the regime’s other financial lifelines. Secretary Tillerson has stressed the need for all nations to contribute to a solution. Yet the UNSCR only capped North Korean workers, seemingly accepting the status quo where Pyongyang sends as many as 120,000 of its citizens overseas to work in slave labor conditions. The Kim regime receives at least $500 million a year from the practice and the new UN resolution http://www.un.org/en/ga/search/view_doc.asp?symbol=S/RES/2371(2017) Pyongyang uses the revenue for its nuclear weapons and missile programs. This is unacceptable. We should cut off this economic lifeline to the regime wherever it exists, and the new sanctions law mandates sanctions against those who employ these laborers.

What do 'with more designations' and 'cap' mean?

Consulting dictionaries didn't help for me.