Clarifies, under Section 41 of SL 1947-677 (definitions provision of the act authorizing Winston-Salem and Forsyth County to adopt zoning laws), that Board of Alderman and City Council have the same meaning. Directs, under Section 23 of SL 1947-677, as amended, that the City of Winston-Salem and Forsyth County must enact an ordinance to confer authority upon the joint City and County Planning Board to either revise existing zoning ordinances or to prepare new ordinances. Allows the city to enact ordinances to confer the authority for the rezoning of property, including site plan amendments, to the joint City and County Planning Board, with right of appeal and review by the City Council. Requires that authority to be exercised by the joint City and County Planning Board under such rules, regulations, and guidelines as may be established by the City Council. Makes technical changes, including replacing references to the Board of Alderman with City Council.  Applicable to Winston-Salem only.