Section 23 of the Principal Act is amended as follows:(a) by omitting from subsection (2) "blood" three times occurring and substituting "breath" ;(b) by inserting in subsection (4) "breath or" after "in the" ;(c) by inserting in subsection (4) "breath or" after "been the concentration of alcohol in his" ;(d) by inserting in subsection (4) "breath or" after "that the concentration of alcohol in his" ;(e) by inserting in subsection (5) "breath or" after "analysis had alcohol in his" ;(f) by inserting in subsection (5) "breath or" after "he had alcohol in his" ;(g) by inserting in subsection (6) "breath or" after "shown that the concentration of alcohol in the" ;(h) by inserting in subsection (6) "breath or" after "proved, that the concentration of alcohol in the" .