Texas Finance Code - FIN § 343.101. Refinancing

(a) For purposes of this section, a low-rate home loan is a home loan that at its inception carries an interest rate two percentage points or more below the yield on treasury securities having comparable periods of maturity to the loan maturity, except that if the loan's interest rate is a discounted introductory rate or a rate that automatically steps up over time, the fully indexed rate or the fully stepped-up rate, as appropriate, shall be used instead of the rate at the loan's inception to determine whether the loan is a low-rate loan.

(b) A lender may not replace or consolidate a low-rate home loan directly made by a government or nonprofit lender before the seventh anniversary of the date of the loan unless the new or consolidated loan has a lower interest rate and requires payment of a lesser amount of points and fees than the original loan or is a restructure to avoid foreclosure.