CAP140 - Change to BSC Party Obligation

It is proposed that the CUSC be modified to remove an anomaly in Section 6.29.  This currently allows a generator to avoid mandatory accession to the BSC provided another party is responsible under the BSC for its export and either: a) the generator is Exempt and directly connected (Section 6.29.2) or b) the generator is Exemptable, Embedded and Large (Section 6.29.3).  This drafting thus requires an Exempt or Exemptable User, acting as an Embedded Small Power Station or Embedded Medium Power Station, to accede to the BSC even if another party was to be responsible under the BSC for its export.