(a) Within this subchapter a digital signature may be used to authenticate a written electronic communication sent to the Agency if it complies with the following factors:      
        (1) it is unique to the person or individual using it;       
        (2) it is capable of independent verification;       
        (3) it is under the sole control of the person or individual using it; and       
        (4) it is transmitted in a manner that shall make it infeasible to change the data in the communication without invalidating the digital signature.       
      (b) In this section, digital signature means an electronic identifier intended by the person or individual using it to have the same force and effect as the use of a manual signature.     
     Source Note:        The provisions of this §815.103 adopted to be effective November 6, 2000, 25 TexReg 11093