Where there arises a right of retention in
goods by operation of law and while such goods are taken in possession, a right
of retention shall have priority over a matured security interest in such goods in
the following circumstances:
(a) where the right of retention is created in favor of a person in possession
of the goods to secure payment for materials or services with respect to
such goods; and
(b) where such materials or services are provided in the ordinary course of
business.