In the administration of this article the recorder shall interpret its provisions consistently with those documentary stamp tax regulations adopted by the Internal Revenue Service of the United States Treasury Department which relate to the tax on conveyances and identified as sections 47.4361-1, 47.4361-2, and 47.4362-1 of part 47 of title 26 of the Code of Federal Regulations, as the same existed on November 8, 1967, except that for the purposes of this article the determination of what constitutes "realty" shall be determined by the definition or scope of that term under state law. (Ord. No. 1847, § 1)