The Planning Board or Zoning Board of Adjustment, as the case may be, when acting upon an application for development, shall have the power to grant exceptions from the requirements specified in Sections 30-500 and 30-800 of this chapter for such application for development if an applicant or his or her agent can clearly demonstrate that, because of peculiar enforcement of one or more of said requirements is impracticable or will exact undue hardship; however, any exception granted by the Planning Board or Zoning Board of Adjustment, as the case may be, must be reasonable and within the general purpose and intent of the rules, regulations and standards established by this chapter.