[terilyn]

That's how I read it too. I think the comment that it took them a year to announce the change is probably due to the fact that they didn't actually change their accounting until 9/98, but it affected their entire 1998 financials, which were then reported 3/99.

[Texasforever]

From the article

And the SEC can't overlook the delay of more than a year before Halliburton told investors that its accounting had changed.

The Halliburton change notice was clearly less than a year so I don't understand why the article says over a year.