(1) Perfection by control. A security interest in investment property, deposit accounts, letter-of-credit rights, or electronic chattel paper may be perfected by control of the collateral under s. 409.104 , 409.105 , 409.106 , or 409.107 .
(2) Specified collateral: time of perfection by control; continuation of perfection. A security interest in deposit accounts, electronic chattel paper, or letter-of-credit rights is perfected by control under s. 409.104 , 409.105 , or 409.107 when the secured party obtains control and remains perfected by control only while the secured party retains control.
(3) Investment property: time of perfection by control; continuation of perfection. A security interest in investment property is perfected by control under s. 409.106 from the time the secured party obtains control and remains perfected by control until:
(a) The secured party does not have control; and
(b) One of the following occurs:
1. If the collateral is a certificated security, the debtor has or acquires possession of the security certificate;
2. If the collateral is an uncertificated security, the issuer has registered or registers the debtor as the registered owner; or
3. If the collateral is a security entitlement, the debtor is or becomes the entitlement holder.