Dear Scar Light,
Thank you for posting your inquiry on History Hub!
We searched the National Archives Catalog and located a file unit titled Report of the U.S. Representative of the United Nations Committee on the Progressive Development of International Law and its Codification.1947 in the series titled Law Library Files, 1944-1949 in the Records of the Office of the Judge Advocate General (Army) (Record Group 153) that may be of relevance to your inquiry.
We also located 5 series, 24 file units, and 9 items in various record groups for any records relating to Philip C. Jessup for the 1940s that might be of interest to you. Please note that some of the records have been digitized and may be viewed online using the Catalog. For access to non-digitized records, please contact the unit listed in the description.
In addition, there may be some records related to your research in the Central Decimal Files, 1910-1963 in the General Records of the Department of State (Record Group 59) and in the records of the United States Mission to the United Nations located in the Records of the Foreign Service Post of the Department of State (Record Group 84). For more information about these records, please contact the National Archives at College Park - Textual Reference (RDT2) via email at firstname.lastname@example.org and ask that your inquiry be assigned to the Foreign Affairs Subject Matter Expert.
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of NARA staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgement as well as a substantive response to your reference request from various NARA units. We apologize for this inconvenience and appreciate your understanding and patience.
We hope this is helpful. Best of luck with your research!