(1) Group accounts must be drawn up as at the same date as the annual accounts of the parent undertaking.
(2) If the financial year of a subsidiary undertaking dealt with in the group accounts differs from that of the parent undertaking, the group accounts shall be drawn up -
(a) from the accounts of the subsidiary undertaking for its financial year last ending before the end of the parent undertaking's financial year provided that year ended no more than three months before that of the parent undertaking, or
(b) from interim accounts drawn up by the subsidiary undertaking as at the end of the parent undertaking's financial year.