In any prosecution:
1. under section 156.05 or 156.10 of this article, it shall be a defense that the defendant had reasonable grounds to believe that he had authorization to use the computer;
2. under section 156.20, 156.25, 156.26 or 156.27 of this article it shall be a defense that the defendant had reasonable grounds to believe that he had the right to alter in any manner or destroy the computer data or the computer program;
3. under section 156.29 or 156.30 of this article it shall be a defense that the defendant had reasonable grounds to believe that he had the right to copy, reproduce or duplicate in any manner the computer data or the computer program.