AR 11 is common. AR11SR is special required by General Attorney. If GA ask you to tell him or her your address, you need to tell them. 
the below is the law:  
[t]he Attorney General may in his discretion, upon ten days notice, 
require the natives of any one or more foreign states, or any class 
or group thereof, who are within the United States and who are 
required to be registered under this subchapter, to notify the 
Attorney General of their current addresses and furnish such 
additional information as the Attorney General may require.