The Land Development Board, when acting upon applications for preliminary or minor subdivision approval or upon applications for preliminary site plan approval, shall have the power to grant exceptions and waivers from the requirements for subdivision or site plan approval as specified in § 12-9 if an applicant or his agent can clearly demonstrate that, because of peculiar conditions pertaining to his land, the literal enforcement of one or more of the requirements is impracticable or will exact undue hardship; however, any exception granted by the Land Development Board must be reasonable, must not be substantially detrimental to the public good and must be within the general purpose and intent of the rules, regulations and standards established by this chapter.

The Land Development Board shall have the power to grant exceptions and waivers in the same manner and to the same extent as the Land Development Board whenever acting upon applications for preliminary or minor subdivision approval or for preliminary site plan approval in connection with applications for a use or "d" variance.