Western Gateway Urban Heritage Park: The land use controls of the urban renewal plan entitled "Western Gateway Urban Heritage Park Urban Renewal Plan," approved by the City Council of the City of North Adams as Council Paper No. 8704-3 and incorporated herein by reference, shall be in full force and effect in the UR-2 District in said City of North Adams; excluding therefrom, however, any provision therein allowing or permitting the redevelopment authority to modify, amend, change, or alter at their discretion any provision thereof.