Ladies and gentlemen, start your stopwatches!For the first time, O’Melveny & Myers has set down specific billing expectations for its lawyers.

In memos sent out in March, the Los Angeles-based O’Melveny reminded partners and associates that they need to make a “full-time commitment” to the firm. For partners, that means a hefty 2,400 hours a year or more, including nonbillable activities like business development and administrative tasks.