Section 1 of the ASME Y14.5 standard is entitled "Scope, Definitions, and General Dimensioning". It doesn’t say tolerancing. Fifty years ago in Y14.5 there was minimal support for applying ± tolerances to locating dimensions. About 30 years ago this minimal support in Y14.5 was removed in favor of basic dimensions and geometric tolerancing -- especially for controlling the location of features. Yet, some people insist that Section 1 somehow legitimizes locating features using ± toleranced dimensions. It doesn’t!
There is a figure in the Standard that is very similar to this first drawing. If these dimensions were all ± toleranced the drawing would have many different meanings depending on who is doing the reading. There is no support in the ASME Y14.5 standard for using ± tolerancing on locating dimensions such as these.