ACADEMIC Chan Wing-tai has been appointed a member of the Boundary and Election Commission to replace Professor Leung Chi-keung who resigned two months ago. Mr Chan, 50, is the head of the Department of Applied Social Studies at the City University and a member of the Committee on the Promotion of Civic Education and the Administrative Appeals Board. Mr Chan's appointment to the commission will last until 1997. The three-member commission, set up last year to supervise election-related activities, is chaired by Mr Justice Woo with Norman Leung Nai-pang as the other member. Yesterday, it released an amended election guideline for the municipal council elections next March. The amended guideline will bar last-minute swapping of nomination forms. Returning officers will not accept a nomination paper which has been corrected unless the correction is signed by a sufficient number of subscribers. In the district board elections in September, two candidates were found to have swapped their nomination paper without notifying their subscribers. The latest guideline also requires candidates to apply to the returning officer of the constituency if they want to put election banners and boards on government premises. The returning officer will then allocate the spaces by drawing lots. In the last election, public spaces on less-busy streets were allocated by the Lands Department on a 'first-come first-served' basis. The commission has also finished its report on the district board elections and submitted it to the Governor.