An application used in my industry is pneumatic or hydraulic communication holes in parts when you need to control minimum wall thicknesses between features. As the holes get smaller they can have larger positional tolerance. In these cases you are not concerned with part mating. Perfect form at...
There is also a document out there ASME PDS-1.1-2013 that states if no reference to a standard is referenced on the drawing (company, regional, national or international), that the latest version of ASME Y14.5 for interpretation. Not sure how that is enforced but take it for what it's worth.
