(a) Notwithstanding any other provision of this title, a company that is classified as a transitioning company effective January 1, 2006, and that has not more than three million access lines in service in this state on that date shall reduce both the company’s originating and terminating per minute of use switched access rates in each market in accordance with this section.
(b) On July 1, 2006, the transitioning company shall reduce both the company’s originating and terminating per minute of use switched access rates in each market by an amount equal to the lesser of:
(1) 25 percent of the difference in the company’s rates in effect on June 30, 2006, and the company’s respective federal originating and terminating per minute of use switched access rates in effect on that date; or
(2) an amount derived by multiplying that difference by a percentage derived by dividing the number of the company’s markets that are not regulated on July 1, 2006, by the total number of the company’s markets on December 30, 2005.

(c) On July 1, 2007, the transitioning company shall reduce both the company’s originating and terminating per minute of use switched access rates in each market by an amount equal to the lesser of:
(1) 25 percent of the difference in the company’s rates in effect on June 30, 2006, and the company’s respective federal originating and terminating per minute of use switched access rates in effect on that date; or
(2) an amount derived by multiplying that difference by a percentage derived by dividing the number of the company’s markets that were deregulated in the prior 12 months by the total number of the company’s markets on December 30, 2005.
(d) On July 1, 2008, the transitioning company shall reduce both the company’s originating and terminating per minute of use switched access rates in each market by an amount equal to the lesser of:
(1) 25 percent of the difference in the company’s rates in effect on June 30, 2006, and the company’s respective federal originating and terminating per minute of use switched access rates in effect on that date; or
(2) an amount derived by multiplying that difference by a percentage derived by dividing the number of the company’s markets that were deregulated in the prior 12 months by the total number of the company’s markets on December 30, 2005.
(e) On July 1, 2009, and each succeeding year thereafter on July 1, the transitioning company shall reduce both the company’s originating and terminating per minute of use switched access rates in each market by an amount derived by multiplying the difference in the company’s rates in effect on June 30, 2006, and the company’s respective federal originating and terminating per minute of use switched access rates in effect on that date by a percentage derived by dividing the number of the company’s markets that were deregulated in the prior 12 months by the total number of the company’s markets on December 30, 2005, except that a transitioning company shall be required to reduce both the company’s originating and terminating per minute of use switched access charges to parity with the company’s respective federal originating and terminating per minute of use switched access charges if more than 75 percent of the transitioning company’s markets are not regulated on July 1 of 2009 or any succeeding year.
(f) After reducing the rates under Subsection (e), a transitioning company shall maintain parity with the company’s federal originating and terminating per minute of use switched access rates. If the company’s federal originating and terminating per minute of use switched access rates are changed, the company shall change the company’s per minute of use switched access rates in each market as necessary to re-achieve parity with the company’s federal originating and terminating per minute of use switched access rates.