This chapter shall take effect immediately upon filing with the State's Secretary of State and posting in accordance with Village Law Section 7-706 and filing of the local law with the Secretary of State in accord with Article 3 of the General Municipal Home Rule Law. However, nothing herein contained shall require any change in the plans, construction, or designated use of a building for which a permit has been issued or which is under construction at the time of passage of this chapter and which entire building shall be completed within one year from the effective date of this chapter.