In this chapter, the following terms have the meaning indicated. Terms Defined. “Authorized activities” means professional development activities that: Meet the criteria set forth in Regulation .04 of this chapter; and Are approved and accepted for credit by the American Institute of Architects (AIA), the National Council of Architectural Registration Boards (NCARB), or the Board. “Board” means the State Board of Architects. “Health, safety, and welfare subjects (HSW)” means content areas identified as such by NCARB or AIA, as those content areas may be updated or otherwise amended from time to time. “Learning unit (LU)” means one continuous instructional hour spent attending and completing the professional development activity in health, safety, and welfare subjects. One LU means a minimum of 50 minutes of face-to-face or distance learning instruction per 60-minute hour and is equivalent to a comparable single educational unit that may be utilized by AIA or NCARB.