      The crossing of blocks outside the prevailing quotes is governed bythe NYSE. The Exchange formally defines blocks as trades of either 10,000shares or $200,000, whichever is less. Under NYSE Rules16, a memberreceiving a block order which may not be readily absorbed by the marketshould first explore interest in the crowd, including the specialist's owninterest. If asked, the specialist may recommend a "clean-up" price for theblock. A member wanting to cross a block of stock at a specific priceoutside the quote must announce a clean-up price to the crowd and then mayfollow one of two procedures. In the first procedure the member must fill,at the announced clean-up price, all orders in the book and in the crowd aswell as all better-priced displayed Intermarket Trading System (ITS)quotes. (ITS is an electronic communications network that links marketprofessionals from the major listed exchanges.)