The Board of Supervisors shall refer each petition or proposal for change or amendment to the Township Planning Commission, and County Planning Commission at least 30 days prior to the hearing, which shall consider whether or not such proposed change or amendment would be, in the view of the Commission, consistent with and desirable in furtherance of the Comprehensive Plan upon which this chapter is based, as the same may be modified from time to time. The Commission shall transmit its conclusion thereon, together with its reasons therefor, to the Board of Supervisors within 30 days. The Board of Supervisors shall take such conclusion and reasons into consideration in reaching its decision, but shall not be bound thereby.