|(a) The owner or operator of a tank for which insurance coverage or other financial assurance has terminated shall ensure that the tank is empty, as defined in §334.54(d) of this title (relating to Temporary Removal from Service), not later than the 90th day after the coverage terminates, unless the owner or operator provides the commission proof that the owner or operator maintains evidence of financial responsibility. The owner or operator shall demonstrate that the tank is empty by submitting evidence satisfactory to the executive director if requested by the executive director. (b) Any regulated substances removed from the tank must be handled properly, in accordance with agency requirements. If the regulated substances are disposed of, disposal must be at a properly licensed facility. (c) Failure to empty a tank, or to demonstrate to the executive director that it has been emptied as required under subsection (a) of this section may be considered by the commission to be a separate violation in addition to a violation for failure to maintain financial assurance as required by §37.815 of this title (relating to Amount and Scope of Required Financial Assurance). (d) An owner or operator may demonstrate that the owner or operator had been released from financial assurance requirements by having met all the requirements of §37.885 of this title (relating to Release from the Requirements) prior to the date of financial assurance termination. However, even in the case where a tank has been properly temporarily removed from service by having met all the requirements of §334.54 of this title, including corrosion protection and leak detection, regulated substances may not remain in the tank longer than 90 days, in accordance with subsection (a) of this section. (e) Subsection (a) of this section does not affect the commission's authority to require a shutdown of a facility under Texas Water Code, §26.3475(e), nor any other sections, rules, or statutes, with regard to financial assurance.