Chevron Corp. has notified the Nigeria/Sao Tome Joint Development Authority of its intent to move into the second exploration phase for Block 1 <a href="http://www.newswire.ca/en/releases/archive/March2009/04/c5469.html" rel="nofollow" target="_blank">http://www.newswire.ca/en/releases/archive/March2009/04/c5469.html</a>