On this site it has details of the regulations for being eligable for the tickets. http://michaeljacksonfuneral.org/
The Staples Center website has eliminated the text that the offer to win tickets is only valid to United States residents.
However, within the fine print of NEW Official Rules posted at ( http://www.staplescenter.com/media/media0000001101.pdf ) it states that all winners must complete the IRS W-9 tax form, The W-9 requires that you provide your US tax identification number and state under penalty of perjury that you are a United States citizen.
It is possible this is a lawyer mistake in the fine print of the legalese and the intent is to allow anyone worldwide to register.
Additionally, Residents of the states of New York, Florida, and Rhode Island are not eligible to enter and win.
If this is the case, as it was not made clear, many people who have registered and won tickets will not be able to receive them upon collection! What will they do then!?