(1) If 2 or more persons are taken to have warranted in the terms mentioned in subregulation 7.11.29(2), (4) or (6), the persons are taken to have warranted jointly and severally.
(2) If 2 or more persons are liable as mentioned in regulation 7.11.30, 7.11.31 or 7.11.32, the persons are liable jointly and severally.