Geometric Dimensioning & Tolerancing : Rules

Individual feature of size ( Rule #1 ) : Where only a tolerance of size is specified, the limits of size of an individual feature prescribe the extent to which variations in its geometric form, as well as size, are allowed.

All applicable geometric tolerances ( Rule #2 ) : RFS (Regardless of Feature Size) applies, with respect to the individual tolerance, datum reference, or both, where no modifying symbol is specified. MMC (Maximum Material Condition) or LMC (Least Material Condition) must be specified on the drawing where it is required.

Alternative practice ( Rule #2a ) : For a tolerance of position, RFS may be specified on the drawing with respect to the individual tolerance, datum reference, or both.