The Organization of American States (OAS) has announced that the Inter-American Juridical Committee (CJI) has approved the Guide on the Law Applicable to International Commercial Contracts in the Americas. See the summarized recommendations on p. 6, the actual Guide starts on p. 16.
The Rapporteur of the Guide is Dr José Antonio Moreno Rodríguez.
Importantly, one of the recommendations of the Guide is that “OAS Member States, regardless of whether they have or have not ratified, or do or do not intend to ratify the Mexico Convention, are encouraged to consider its solutions for their own domestic legislation, whether by material incorporation, incorporation by reference, or other mechanisms as applicable to their own domestic legal regimes, taking into consideration subsequent developments in the law applicable to international commercial contracts as expressed in the Hague Principles and as described in this Guide.”
Unfortunately, only two States are parties to the Mexico Convention: Mexico and Venezuela. See here.
While the OAS Guide takes into consideration and examines both instruments, it should be noted that the official article-by-article Commentary on the Hague Principles is available here.