California Code
CHAPTER 3.4 - Schoolbus Idling and Idling at Schools
Section 39640.

39640. The purpose of this chapter is to reduce public exposure, especially schoolage children’s exposure, to diesel exhaust particulate matter and other toxic air contaminants by limiting unnecessary idling of vehicular sources.

(Added by Stats. 2009, Ch. 561, Sec. 1. (SB 124) Effective January 1, 2010.)