If the executive director determines that participation is in the best interest of this state, the following entities are eligible customers for services the department provides:
(1) a state agency;
(2) a local government;
(3) the legislature or a legislative agency;
(4) the supreme court, the court of criminal appeals, or a court of appeals;
(5) a public hospital owned or operated by this state or a political subdivision or municipal corporation of this state, including a hospital district or hospital authority;
(6) an independent organization certified under Section 39.151, Utilities Code, for the ERCOT power region;
(7) the Texas Permanent School Fund Corporation;
(8) an assistance organization, as defined by Section 2175.001;
(9) an open-enrollment charter school, as defined by Section 5.001, Education Code;
(10) a private school, as defined by Section 5.001, Education Code;
(11) a private or independent institution of higher education, as defined by Section 61.003, Education Code;
(12) a public safety entity, as defined by 47 U.S.C. Section 1401;
(13) a volunteer fire department, as defined by Section 152.001, Tax Code; and
(14) a governmental entity of another state.