225 ILCS 705/1.13

(225 ILCS 705/1.13) (from Ch. 96 1/2, par. 263)

Sec. 1.13. "Permissible" means any explosive or mechanical device, or chemical-mechanical device, which will not cause the ignition of mixtures of methane and air when detonated or operated.

(Source: Laws 1953, p. 701.)