The creation of a Zoning Board of Adjustment is mandated pursuant to the terms of N.J.S.A. 40:55D-69. The aforementioned statute permits eligible municipalities the option of creating a nine-member Planning Board to exercise all of the powers and duties of the Board of Adjustment as provided by N.J.S.A. 40:55D-25c. The Borough meets the criteria, established in N.J.S.A. 40:55D-25c, and has determined that it is in the public's interest to combine the powers and authority of the Zoning Board of Adjustment and the Planning Board and allow the Planning Board to exercise its powers and duties.