Texas Code of Criminal Procedure - CRIM P Art. 17A.05. Service on association

(1) to a high managerial agent at any place where business of the association is regularly conducted;  or

(2) if the peace officer certifies on the return that he diligently but unsuccessfully attempted to serve a high managerial agent, to any employee of suitable age and discretion at any place where business of the association is regularly conducted;  or

(3) if the peace officer certifies on the return that he diligently but unsuccessfully attempted to serve a high managerial agent, or employee of suitable age and discretion, to any member of the association.