This chapter does not—
(a) prevent a person from being held vicariously liable for a proportion of an apportionable claim for which someone else is liable; or
(b) prevent a person from being held jointly and severally liable for the damages awarded against someone else as agent of the person; or
(c) prevent a partner from being held severally liable with another partner for the proportion of an apportionable claim for which the other partner is liable; or
(d) affect the operation of any other Act to the
extent that the other Act imposes several liability on anyone for what would
otherwise be an apportionable claim.