(a) In addition to the procedure provided by this chapter for the extension of restrictions, the procedure provided by the original restrictions for the initial extension of the restrictions, including the requirement that a specified percentage of a specified class approve the extension, may be used for successive extensions of the original restrictions, provided that the approval obtained includes the approval of the owners of not less than a majority of the lots in the subdivision.
(b) An extension of the restrictions as described by Subsection (a) is for a period equal to the original term of the restrictions or a shorter period agreed to by the owners of a majority of the lots in the subdivision.

(c) The procedure provided by this chapter for the extension or termination of restrictions is cumulative of and not in lieu of any other method by which restrictions of a subdivision to which this chapter applies may be added to, modified, created, extended, or terminated.