I asked about the same question a while back. This is what I got from USARK:
"They are going to be hand delivered to your US Senator to avoid weeks of screening. That means they have to be presented in an open stack of letters. We don't want to have to open envelpoes, unfold and separate letters. If you send them flat in a large mailer it will facilitate the delivery by reducing the amount of work we have to do"
Each person writes to the two senators that represent their state. All of the letters for each senator will be given to that senator.
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Cheers,
Jessica Gibbs
Ball Pythons; Corn Snakes; Green Tree Python; Jungle Carpet Python; Bci; Bcl; Bco
3.0 Crazy Dogs and 2.0 cats
Some Tropical Fish
...........and growing!