You can still make public comments until the deadline of midnight March 25, the date of the last public hearing. The NRC will meet in May to announce its decision to adopt, not adopt, or adopt with modification the various proposed rule changes. [May 19, 2015 10:00 a.m., EDT (9:00 a.m., CDT), Ballroom, Garrison, Fort Harrison State Park, Indianapolis]

See link to updated Timeline (updated 2-18-15). It also shows times and locations of the 3 public hearings. You may also want to read the fine print.

http://www.in.gov/nrc/files/lsa14453_timeline.pdf