The Moot Competition Problem for the 2023-24 edition consists of the following memorials for claimant and respondent, plus the text of the Cap and Trade Termination Act, and some of the legal bases, such as NAFTA Ch. 11 and USMCA Ch. 14. Please note that this is an arbitration under the 2022 ICSID Arbitration Rules.
See here for the documents: