No final action shall, unless conditioned as hereinafter provided
be taken by any official, board, commission or agency of the City
prior to the receipt of such report or, if no such report is received,
the expiration of 30 days after such referral was received by the
County Planning Board. By mutual agreement between the County Planning
Board and City Planning Board, with the approval of the applicant,
the thirty-day period may be extended for an additional thirty-day
period, and any such extension shall extend the time within which
the City official, board, commission or agency shall be required to
act on the referred application. Any approval granted prior to receipt
of such report or the expiration of such time shall be conditioned
on the receipt of a favorable report or the expiration of such time
without receipt of any report.