15-5927 Bill 51 Amending the Allentown City Code by Adding Chapter 670, Workforce Housing Zoning creating requirements for land development plans that contain 10 or more additional residential dwelling units to provide work force units; providing certain types of relief for the construction of work force units; allows for alternatives to on-site construction - fee in-lieu of construction, off site development, land, or land and building donation; authorizes a review of the legislation after 18 months.