Amend HB 768 by striking all below the enacting clause and replacing it with the following: SECTION 1. Section 451.002, Labor Code, is amended by amending Subsection (c) to read as follows: (c) The burden of proof in a proceeding under this section is on the employee to establish that an action of the employee protected under Section 451.001 was the substantial cause of the employee's discharge from the position of employment. SECTION 2. This Act takes effect September 1, 1997, and applies only to a cause of action that accrues on or after the effective date of this Act. An action that accrues before the effective date of this Act is governed by the law in effect when the action accrued, and the former law is continued in effect for that purpose. SECTION 3. The importance of this legislation and the crowded condition of the calendars in both houses create an emergency and an imperative public necessity that the constitutional rule requiring bills to be read on three several days in each house be suspended, and this rule is hereby suspended.