In UGI Utilities, Inc. v. Unemployment Compensation Board of Review, 776 A.2d 344 (Pa. Cmwlth. 2001), this Court affirmed the dismissal of an appeal in an unemployment case because the appeal was not filed in the manner and within the time specified by Board regulations. The Court concluded that the applicable appeal regulations do not provide for "substantial compliance." It also observed that a court should defer to an agency's interpretation of its own regulation unless that interpretation is clearly erroneous and is inconsistent with the statute under which the regulation was promulgated.