Please answer the question within 30 min (citing all sources used to make up the answer)

NOTE: refer to relevant Articles, relevant cases, legislations, declarations, Vienna Conventions on the law of treaties 1996 (VCLT) and statutes,(ICJ/ ICCPR) or textbooks such as 'The internationalists by Hathaway and Shapiro' as well as 'Crawford 2019' within your answer. (PLEASE USE IN TEXT CITATION)

QUESTION:

"International law itself is neither monist nor dualist", do you support this statement?State your reasons to justify the answer after identifying the key differences between monism and dualism.