(a) by striking out the words “a motorized snow vehicle as defined in the Motorized Snow Vehicle Act,” where they appear in the definition “motor vehicle” in section 1 thereof and substituting therefor the words “an all-terrain vehicle as defined in the All-Terrain Vehicle Act,”;

(b) by striking out the words “Motorized Snow Vehicle Act” where they appear in subsection 4(3) thereof and substituting therefor the words “All-Terrain Vehicle Act”.