. (b)  The department may modify the criteria described by Subsection (a) as necessary for the proper implementation of the alert system.  Added by Acts 0000, 00th Leg., R.S., Ch. 000 (H.B. 000), Sec. 0, eff. September 0, 0000.   Sec. 000.000.  LOCAL LAW ENFORCEMENT AGENCIES.  Before requesting activation of the alert system, a local law enforcement agency must verify that the criteria described by Section 000.000(a) 