Within all district(s), any applicant for a residential development in the Township of Lyndhurst that includes four or more residential lots and/or dwelling units shall be required to provide the number of affordable housing units equivalent to 20% of the total number of market rate units which will result from the proposed development, with any decimal amount rounded to the next highest whole number. All residential lots and/or dwelling units created from sub portions of an original tract of land during the time period between January 1, (2008) and December 31, (2018) shall be added together for the purposes of this section provision, even if an individual subdivision and/or site plan created less than eight residential lots and/or dwelling units.