(1) If more than one person is responsible for damage arising from a tort, then they are jointly and severally liable.
(2) If, besides the person who is obliged to provide compensation for damage caused by another person under sections 831 and 832, the other person is also responsible for the damage, then in their internal relationship the other is obliged alone, and in the case specified in section 829, the person with a duty of supervision is obliged alone.
(3) If, besides the person who is obliged to provide compensation for damage under sections 833 to 838, a third party is responsible, then in their internal relationship the third party is obliged alone.