Press Statement
https://www.state.gov/r/pa/prs/ps/2018/08/285043.htm
Previewing the Imposition of Chemical and Biological Weapons Control and Warfare Elimination Sanctions on Russia
Special Briefing
Senior State Department Officials
Via Teleconference
https://www.state.gov/r/pa/prs/ps/2018/08/285046.htm
Собственно механизм санкций прописан в законе 1991 года, который в общей структуре законодательства кодифицирован как 22 USC 5605 - https://www.law.cornell.edu/uscode/text/22/5605