A Party may apply to the Panel for a combination of Relevant BM Units (the “nominated” BM Units) to be treated as a Trading Unit by sending to the Panel a written application stating the Class of application and containing the other information and supported by the documents and other matters referred to in BSCP31 and signed by or on behalf of the Lead Parties for each of the BM Units concerned. A Trading Unit Application shall be made in accordance with and subject to BSCP31. A Trading Unit Application may be made in advance of registration of the Relevant BM Units in accordance with BSCP31; has the meaning given to that term in Section K4.2.1;