(a) The board is subject to:
(1) Subchapter C, Chapter 262;
(2) the open meetings law, Chapter 551, Government Code;
(3) the public information law, Chapter 552, Government Code; and
(4) Chapter 2256, Government Code.
(b) The board is a governmental unit for purposes of Chapter 101, Civil Practice and Remedies Code, and all of its activities are essential governmental functions.
(c) The board and the county when operating under this subchapter are subject to:
(1) Chapter 271;
(2) Chapter 1371, Government Code; and
(3) Subchapters C and D.