As per the website
Important Schedule Changes
There have been several significant changes to the schedule of events. These changes are the rescheduling of some of the matches to other weekends.
One of the most notable (and immediate) changes are the Across the Course and 3×600 matches on the weekend of April 4-5, which have been rescheduled for March 21-22, respectively.
Since this XTC and 3×600 matches on March 21-22 is less than 3 weeks away, you should try and pre-register for either of these events soon.
Other changes including the rescheduling of the NRA High Power Regional (800 Aggregate) and CMP EIC/LEG match.
Please review the Event Calendar and make note of the current schedule of events.