NC holds itself out as a "must be an appraiser to appraise" state. Some sections from the NC Appraisers Act:
"§ 93E‑1‑2.1. Registration, license, or certificate required of real estate appraisers.
Beginning October 1, 1995, it shall be unlawful for any person in this State to act as a real estate appraiser, to directly or indirectly engage or assume to engage in the business of real estate appraisal, or to advertise or hold himself or herself out as engaging in or conducting the business of real estate appraisal without first obtaining a registration, license, or certificate issued by the Appraisal Board under the provisions of this Chapter. It shall also be unlawful, with regard to any real property where any portion of that property is located within this State, for any person to perform any of the acts listed above without first being registered, licensed, or certified by the Appraisal Board under the provisions of this Chapter. (1995, c. 482, s. 1; 2001‑399, s. 1.)"
(note: There was no mention above about FRT or de minimus)
And for CMA/BPOs, that appears to be covered in the next section:
"§ 93E‑1‑3. When registration, license, or certificate not required.
(a) (relates to appraisers being people, not partnerships)
(b) (has been repealed by more recent legislation)
(c) Nothing in this Chapter shall preclude a real estate broker or salesman licensed under Chapter 93A of the General Statutes from performing a comparative market analysis as defined in G.S. 93E‑1‑4, provided the person does not represent himself or herself as being a registered trainee or a State‑licensed or State‑certified real estate appraiser. A real estate broker or salesperson may perform a comparative market analysis for compensation or other valuable consideration only for prospective or actual brokerage clients or for real property involved in an employee relocation program."
All the NC Appraiser's Act is visible online at:
http://www.ncleg.net/gascripts/Statutes/StatutesTOC.pl?Chapter=0093E