The provisions of this chapter are intended as minimum standards for the protection of the public health, safety and welfare. The Planning Commission reserves the right to modify or to extend them conditionally in individual cases as may be necessary in the public interest; provided, however, that such variation shall not have the effect of nullifying the intent and purpose of this chapter. The list of such modifications and the reasons for them shall be entered in the minutes of the Planning Commission, and a copy of this entry shall be transmitted to Council, together with the approved plans, for Council approval. Upon approval by Council, said modifications shall be clearly defined and entered on the final plan and signed by the President of the Borough Council.