3.—(1) Subject to sub-paragraph (4), in any case where an apportionment is to be carried out by arbitration, an arbiter shall be appointed by agreement between the transferor and transferee within the period of 28 days from the change of occupation of the holding or part of the holding and the transferee shall give notice of the appointment of the arbiter to the Scottish Ministers within fourteen days from the date of the appointment.
(2) Notwithstanding sub-paragraph (1), the transferor or the transferee may at any time within the period of 28 days referred to in sub-paragraph (1) make an application to the Scottish Ministers for the appointment of an arbiter.
(3) If at the expiry of the period of 28 days referred to in sub-paragraph (1) an arbiter has not been appointed by agreement between the transferor and the transferee nor an application made to the Scottish Ministers under sub-paragraph (2), the Scottish Ministers shall at their own instance proceed to appoint an arbiter.
(4) Where an apportionment under regulation 39(4)(b) is to be carried out by arbitration, the producer shall either appoint an arbiter with the agreement of all persons with an interest in the holding or make an application to the Scottish Ministers for the appointment of an arbiter.