Directs the NC Building Code Council (Council) to amend the Residential Code for One- and Two-Family Dwellings in order to permit dimension lumber that has not been grade-stamped under the authority of a lumber grading bureau to be used in the construction of one-and two-family dwellings, so long as the dimension lumber meets four criteria, including that the sawmill supplying the dimension lumber provides a local mill certification, as defined. Authorizes the Council to issue temporary implementing rules. Sunsets the act when the Council issues permanent rules substantially similar to the act's provisions.