Amend Floor Amendment No. 24 (second reading) to CSSB 5, by 
striking paragraph (c) of Chapter 401.013 of the Labor Code, and 
adding a new paragraph (c) to read as follows:
	(c)  Upon the voluntary introduction into the body of any 
substance listed under subsection (a)(2)(b), based upon a blood 
test or urinalysis, it is a rebuttable presumption that a person is 
intoxicated and not having the normal use of mental or physical 
faculties.