(a) On the date the last market of an incumbent local exchange company is deregulated, the company shall reduce both the company’s originating and terminating per minute of use switched access rates in each market to parity with the company’s respective federal originating and terminating per minute of use switched access rates.
(b) After reducing the rates under Subsection (a), a deregulated 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.