17 C.F.R. § 247.772
(a) A bank is exempt from the definition of the term “broker” under section 3(a)(4) of the Act (15 U.S.C. 78c(a)(4)), to the extent that, as an agent, it engages in or effects securities lending transactions, and any securities lending services in connection with such transactions, with or on behalf of a person the bank reasonably believes to be:
(c) Securities lending services means: