Enacts new GS 143-133.1, forbidding any governmental unit or entity awarding a government construction contract from requiring, prohibiting, or otherwise discriminating against a bidder or contractor for adhering to or not adhering to an agreement with a labor organization for the project. Forbids a governmental unit or entity from conditioning a grant, tax reduction, or credit on adherence or non-adherence to an agreement with a labor organization in a construction contact. Permits a governmental unit to exempt a particular project, contract, grant, tax reduction, or credit from such requirements if necessary to avert a public health or safety threat, as specified. Prohibits discrimination when awarding a contract, grant, reduction, or credit based on participation or non-participation with a labor organization. Provides that GS 143-133.1 does not (1) prohibit employers or others from engaging in activities protected by the National Labor Relations Act or (2) interfere with labor relations not regulated by the Act.