(a) On written request of a law enforcement agency in this state or a federal law enforcement agency and pending the issuance of a subpoena or other court order described by Article 24A.001, an online service provider that provides service in this state shall take all steps necessary to preserve all records or other potential evidence in a criminal trial that is in the possession of the online service provider.
(b) Subject to Subsection (c), an online service provider shall preserve information under Subsection (a) for a period of 90 days after the date the online service provider receives the written request described by Subsection (a).
(c) An online service provider shall preserve information under Subsection (a) for the 90-day period immediately following the 90-day period described by Subsection (b) if the requesting law enforcement agency in writing requests an extension of the preservation period.