Contracting activities shall provide nominations for appointment of Contracting Officers through appropriate acquisition channels to the HCA for review. The HCA shall appoint an individual as a Contracting Officer only when a valid organizational need is demonstrated and after considering such factors as volume of actions, complexity of work, and structure of the requesting organization. The HCA shall also ensure that a Contracting Officer candidate meets the FAC-C or HHS SAC certification requirements, as appropriate. Consistent with FAR 1.603-2, the HCA shall determine the documentation required when the requested appointment and authority will not exceed the micro-purchase threshold.