WASHINGTON — President Bush said today he will lift key trade sanctions against North Korea and remove it from the U.S. terrorism blacklist, a remarkable turnaround in policy toward the communist regime he once branded as part of an "axis of evil."

The announcement came after North Korea handed over a long-awaited accounting of its nuclear work to Chinese officials today, fulfilling a key step in the denuclearization process.

Bush called the declaration a positive step along a long road to get the nation to give up its nuclear weapons. Yet, he remained wary of the regime, which has lied about its nuclear work before. And North Korea's declaration, received six months late, falls short of what the administration once sought, leaving it open to criticism from those who want the U.S. to take an even tougher stance against the regime.

"We will trust you only to the extent you fulfill your promises," Bush said in the Rose Garden. "I'm pleased with the progress. I'm under no illusions. This is the first step. This isn't the end of the process. It is the beginning of the process."

To demonstrate that it is serious about foregoing its nuclear weapons, North Korea is planning the televised destruction of a 65-foot-tall cooling tower at its main nuclear reactor at Yongbyon. The cooling tower is a key element of the reactor, but blowing it up — with the world watching — has little practical meaning because the reactor already was nearly disabled.

Specifically, Bush said the U.S. would erase trade sanctions under the Trading With the Enemy Act, and notify Congress that, in 45 days, it intends to take North Korea off the State Department list of nations that sponsor terrorism.

"If North Korea continues to make the right choices it can repair its relationship with the international community ... If North Korea makes the wrong choices, the United States and its partners in the six-party talks will act accordingly," Bush said.

The declaration, about 60 pages of documentation, is the result of long-running negotiations the United States, Japan, South Korea, China and Russia have been having with Pyongyang.

A senior U.S. official said the declaration contains detailed data on the amount of plutonium North Korea produced during each of several rounds of production at a now-shuttered plutonium reactor. It is expected to total about 37 kilograms of plutonium — enough to make about a half-dozen bombs.

However, the declaration, which covers nuclear production dating back to 1986, does not contain detailed information about North Korea's suspected program of developing weapons fueled by enriched uranium.

It also does not provide a complete accounting of how it allegedly helped Syria build what senior U.S. intelligence officials say was a secret nuclear reactor meant to make plutonium, which can be used to make high-yield nuclear weapons. Israeli jets bombed the structure in the remote eastern desert of Syria in September.

North Korea promised to complete the declaration by the end of last year in exchange for removal from U.S. terrorism and economic sanctions blacklists, which restrict its foreign trade and ability to get loans from international development banks.

North Korea was put on the list of nations that sponsor terrorism for its alleged involvement in the 1987 bombing of a South Korean airliner that killed 115 people.