Question on First Article Inspection referencing ISO 2768

I am not sure on how to handle a customer supplied job that requires a FAIR and the print is dimensioned in MM and references ISO 2768. I need to balloon the print. Do I do it in MM or convert to decimals. Is there a standard that addresses this situation ? Thanks

Not sure about the standards part, but we use MM and then put decimal equivalent in brackets as "60mm [2.362]"