Does ntpd have the ability to control when the daemon skews time ?

Issue

• Does ntpd have the ability to control when the daemon skews time vs resetting the clock?
• I have a business requirement covering time sync for trading systems which will change around June 30, 2015 from 1 second to 50ms.
• Ideally I want to configure ntpd to skew time until it hits a defined threshold like 48ms from the source.