Texas Government Code - GOV'T § 2054.0525. Customers Eligible for Department Services

(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.