It is a common mistake to think the datasheet is the code. In reality, is an optional mandatory appendix within the 2013 edition of ASME BPVC Section VIII.
: A list of default standards used (e.g., ASME Y14.5 for tolerancing, ASME B46.1 for surface texture). asme pds112013 pdf
Websites like ANSI, IHS Markit, and Techstreet also sell licensed versions of the PDF. It is a common mistake to think the datasheet is the code
"Dimensioning, Tolerancing, Surface Texture, and Metrology Standards—Rules for Drawings with Incomplete Reference to Applicable Drawing Standard" ASME Y14.5 for tolerancing