(a) The provisions of Sections 634.04 and 634.05 shall not apply to organized school-related programs, activities or events, or to municipal-authorized parades, fireworks displays or to municipal-sanctioned functions.
(b) The provisions of Section 634.05 shall not apply to:
(1) Activities covered by subsections (c), (g), (h) and (k) of Section 634.04;
(2) Refuse collection vehicles; or public works projects.