Pharmacopoeias are assemblages of approved and binding quality regulations that define test requirements and techniques for the analysis of drugs, among other things. Both the European Pharmacopoeia (Ph. Eur.) and the United States Pharmacopeia (USP) include particular chapters that handle the use of laboratory balances.
https://www.news-medical.net/whitepaper/20220801/Regulating-the-use-of-laboratory-balances-in-the-pharmaceutical-industry.aspx