white list

from The Collaborative International Dictionary of English v.0.48

White list \White list\
   (a) A list of business concerns regarded as worthy of
       patronage by reason of compliance with certain
       conditions, as in regard to treatment of employees; as,
       the white list of the Consumers' League. [Cant]
   (b) (New York Stock Exchange) The official list of all
       transactions, published daily on white paper, divided
       into sales from 10 to 12, 12 to 2, and 2 to 3.
       [Webster 1913 Suppl.]