An agency may incorporate the following material by reference in a rule without repeating the text of the referenced material:
In incorporating material by reference, the agency must designate in the rule whether or not the incorporation includes subsequent amendments and editions of the referenced material. The agency can change this designation only by a subsequent rule-making proceeding. The agency must have copies of the incorporated material available for inspection and must specify in the rule both where copies of the material can be obtained and the cost on the date the rule is adopted of a copy of the material.
A statement in a rule that a rule incorporates material by reference in accordance with former G.S. 150B-14(b) is a statement that the rule does not include subsequent amendments and editions of the referenced material. A statement in a rule that a rule incorporates material by reference in accordance with former G.S. 150B-14(c) is a statement that the rule includes subsequent amendments and editions of the referenced material.
N.C. Gen. Stat. § 150B-21.6