请问小白兔及其他高手: what is Direct Mail for filing I-485?等等

在downloaded I-485 file, Page 1 首先讲:

EFFECTIVE APRIL 1, 2005
DIRECT MAIL INSTRUCTIONS FOR PERSONS FILING FORM I-485
If you live in one of these states or territories, please read this notice to determine your filing location:ALASKA, CALIFORNIA, IDAHO, IOWA, KANSAS, MARYLAND, MISSOURI, MONTANA, NEBRASKA, NEW MEXICO,OKLAHOMA, OREGON, TEXAS, AND WASHINGTON
AS PREVIOUSLY PUBLISHED AND REMAINS IN EFFECT - EFFECTIVE DECEMBER 1, 2004 DIRECT MAIL INSTRUCTIONS FOR PERSONS FILING FORM I-485

请问以上到底是讲寄到哪里? 到底是根据住地还是类别? 加州人的EB1A I-140获批准后, I-485该寄往何处?
不胜感激!