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Amend HB 3168 as follows:                                                    
	(1)  Add a new Section 2 as follows:                                           
	SECTION 2.  Section 408.123, Labor Code, is amended by adding 
Subsections (d), (e), (f), and (g) to read as follows:
	(d)  Except as provided in subsections (e), (f) and (g), the 
first valid certification of maximum medical improvement and the 
first valid assignment of impairment rating to an employee are 
final if the certification of maximum medical improvement and/or 
the assigned impairment rating is not disputed within 90 days after 
written notification of the maximum medical improvement and/or 
assignment of impairment rating is provided to the claimant and the 
carrier by verifiable means.
	(e)  The first certification of maximum medical improvement 
and/or impairment rating may be disputed after the 90-day period 
if:
		(1)  There is compelling medical evidence establishing 
the following:
			(A)  a significant error on the part of the 
certifying doctor in applying the appropriate American Medical 
Association Guides and/or calculating the impairment rating;
			(B)  a clear mis-diagnosis or a previously 
undiagnosed medical condition; or
			(C)  prior improper or inadequate treatment of the 
injury which would render the certification of maximum medical 
improvement or impairment rating invalid; or
		(2)  There are other compelling circumstances as 
established by Commission rule.
	(f)  If an employee has not been certified as having reached 
maximum medical improvement before the expiration of 104 weeks from 
the date on which income benefits begin to accrue or the expiration 
of the date of any extension under §408.104, the impairment rating 
assigned after the end of the 104 weeks or after the end of the 
extended period under §408.104 is final if the impairment rating is 
not disputed within 90 days after written notification of the 
maximum medical improvement and/or assignment of impairment rating 
is provided to the claimant and the carrier by verifiable means.
	(g)  If a disputed certification of maximum medical 
improvement or assignment of impairment rating is finally modified, 
overturned or withdrawn, the first subsequent certification and 
assignment becomes final if it is not disputed within 90 days after 
written notification of maximum medical improvement and/or 
assignment of impairment rating is provided to the claimant and the 
carrier by verifiable means.
	(2)  Renumber sections as necessary.