Tolerancing angled notches

unhandled
#1

Does anyone know how machining tolerances work on angled notches ?
a) Tolerance +/- relative to the normal of each surface ?
b) Tolerance +/- along the vertical on each point on a surface ?
c) Tolerance +/- representing the entire width of a section ? (if the notch had a circular cross section this would be the diameter of the section at that location)