In the case that the proposed amendment was not one prepared by the Borough Planning Commission, then in order to provide the Borough Planning Commission with an opportunity to make and submit recommendations with respect to the proposed amendment, Council shall submit the proposed amendment to the Borough Planning Commission not less than 30 days prior to the date on which Council plans to hold the public hearing on the proposed amendment. The recommendations, if any, made by the Borough Planning Commission shall be submitted in writing to Council by not later than the time fixed for the public hearing.