(a) Except as provided by Subsection (b) and regardless of whether a proxy or consent was executed by an owner or member before the mandatory application date, Chapter 6 and any other applicable provision of this code apply to:
(1) a meeting of owners or members held on or after the mandatory application date;
(2) an action undertaken by owners or members under a written consent that takes effect on or after the mandatory application date;
(3) a vote cast at a meeting described by Subdivision (1); and
(4) consent given for an action described by Subdivision (2).
(b) Prior law applies to a meeting of owners or members and to any vote cast at a meeting described by this section if the meeting was initially called for a date before the mandatory application date and notice of the meeting was given to owners or members entitled to vote at the meeting.