(a) An incumbent local exchange company may offer a promotion for a regulated service for not more than 90 days in any 12-month period.
(b) The company shall file with the commission a promotional offering that consists of:
(1) waiver of installation charges or service order charges, or both, for not more than 90 days in a 12-month period; or
(2) a temporary discount of not more than 25 percent from the tariffed rate for not more than 60 days in a 12-month period.

(c) An incumbent local exchange company is not required to obtain commission approval to make a promotional offering described by Subsection (b).
(d) An incumbent local exchange company may offer a promotion of any regulated service as part of a package of services consisting of any regulated service with any other regulated or unregulated service or any service of an affiliate.