eement (howsoever named) is to such agreement as it may be amended, supplemented or extended from time to time, whether before or after the date hereof. 1.3 Clause headings are for ease of reference only. 1.4 Words importing the singular shall include the plural and vice versa. 1.5 For purposes of this Agreement and any future communications between the Parties, the term ??PDC??s?? and ??NIBs?? sh