The provisions of this article shall not be deemed to restrict, abridge or revoke any power which any county or city board of education had prior to the adoption of this article. Without in any way limiting the generality of the foregoing, it is hereby declared that all county and city boards of education shall continue to have, in addition to the powers granted by this article, all the powers granted them by the provisions of Article 5 of this chapter; provided, that the provisions of Section 16-13-107 shall not be applicable to any board of education exercising the powers granted in this article.