Sec. 5. A chain of custody affidavit is sufficient for purposes of this article if it uses the following form or if it otherwise substantially complies with this article:
CHAIN OF CUSTODY AFFIDAVIT

BEFORE ME, the undersigned authority, personally appeared ______________________________, who being by me duly sworn, stated as follows:
My name is __________.  I am of sound mind, over the age of 18 years, capable of making this affidavit, and personally acquainted with the facts stated in this affidavit.
My address is __________.
On the ___ day of __________, 20___, I was employed by ___________.
On that date, I came into possession of the physical evidence described as follows:  (description of evidence)
I received the physical evidence from __________ (name of person or description of location) on the ___ day of __________, 20___, by ___________ (method of receipt).
This physical evidence was in a container described and marked as follows:  (description of container)
I transferred the physical evidence to __________ (name of person or description of location) on the ___ day of __________, 20___, by ___________ (method of delivery).
During the time that the physical evidence was in my custody, I did not make any changes or alterations to the condition of the physical evidence except for those resulting from field or laboratory testing procedures, and the physical evidence or a representative sample of the physical evidence was transferred in essentially the same condition as received.
__________
Affiant
SWORN TO AND SUBSCRIBED before me on the ___ day of __________, 20___.
__________
Notary Public, State of Texas