Secretary of State George Shultz said Monday he expected a heavy agenda for the May superpower summit even without a pact on strategic arms reduction and called new Danish legislation on nuclear weapons a "real problem" for the NATO alliance.)

Shultz, speaking at a news conference after a meeting with NATO foreign ministers and a separate session with Denmark's foreign minister, Uffe Ellermann-Jensen, was asked about a resolution passed by the Danish Parliament that would require foreign ships to declare whether they are carrying nuclear weapons.Both Britain and the United States have policies of neither denying nor confirming the presence of nuclear weapons on their warships, partly to deny terrorists important information.

"It constitutes a real problem, as I see it," Shultz said. "If you like the benefits, if you like the peace and the progress we are making, you ought to like also the responsibilities."

But Shultz stopped short of suggesting that Denmark could no longer remain in the alliance.

Shultz reported to the NATO foreign ministers on his two days of talks in Moscow, where he and Soviet negotiators failed to make any headway toward an agreement to reduce U.S. and Soviet strategic weapons by 50 percent. He left for Washington shortly after the news conference.

The lack of any progress appeared to kill any hope for a strategic arms reduction treaty to be ready by the time of the Moscow summit, which begins May 29.

Shultz said the 50 percent cut proposal is supported by all presidential candidates in the U.S. elections, and therefore negotiations will continue after the summit.

"We'll continue our efforts with strategic arms' negotiations if no agreement is reached by the time of the summit because both sides are very interested in attaining that agreement," Shultz said.

"We'll keep at it. We're not going to stop."

Shultz said that even without an agreement on strategic arms reduction, there would be a "very heavy agenda" for the Moscow summit, including other arms control issues, human rights and regional issues.

On the Middle East, Shultz said in answer to a question that he and Shevardnadze did not discuss any proposal to put the Israeli-occupied territories under an international administration.