13 GCA § 9305: When Possession by Secured Party Perfects Security Interest Without Filing.

A security interest in letters of credit and advices of credit (paragraph (2) (a) of Section 5116) goods, instruments, money, negotiable documents or chattel paper may be perfected by the secured party's taking possession of the collateral. If such collateral other than goods covered by a negotiable document is held by a bailee, the secured party is deemed to have possession from the time the bailee receives notification of the secured party's interest. A security interest is perfected by possession from the time possession is taken without relation back and continues only so long as possession is retained, unless otherwise specified in this division. The security interest may be otherwise perfected as provided in this division before or after the period of possession by the secured party.