QUOTE(YuAndDan @ Dec 7 2007, 01:22 PM)

AP is good for 1 year, or until you have green card interview.
The AP document is good for one year, but I believe if you are planning on being outside of the US for longer than 60days you should notify immigration.
Remember to bring both pages of AP that you got. People bring only 1 since they are identical, but then the officers at POE give a hard time asking where the other one is. Be on the safe side, bring both copies.
Be safe on your travels, hope your father in law will be ok.