(a) All licensees are required to notify the department in writing within 10 days of any change of address.     
      (b) It is the licensee's responsibility to maintain a valid, current address with the department.     
     Source Note:        The provisions of this §2.4 adopted to be effective December 23, 1999, 24 TexReg 11257; amended to be effective August 10, 2005, 30 TexReg 4472