ANCHORAGE -- The Bush administration has no immediate plans to change its policy restricting oil drilling off the coasts of California and Florida, despite the Persian Gulf crisis threatening world supplies, the head of U.S. Minerals Management Service said.

But the gulf conflict could affect the nation's long-term offshore oil drilling policy, Barry A. Williamson, the agency's director, said.

"Obviously, we want to keep our flexibility. That's one of the reasons we argued with people who wanted a permanent {drilling} prohibition," he said in a recent interview.

Williamson said more environmental study of the California and Florida coasts, where offshore lease sales were canceled this summer, was needed before the agency would offer new oil leases for sale.

No leases for California will be offered before 1996 and even later for Florida, he said.

Williamson, who spent last week meeting with Eskimos, Alaskan fishermen and environmental officials, said his office will release a draft of a five-year "outer continental shelf" oil plan at year's end.

That plan, to be made final in mid-1992, is likely to target specific areas for offshore drilling such as the waters off Alaska. The Chukchi Sea, which separates Alaska and northeastern Siberia, could rival the North Sea or the Gulf of Mexico in oil production, he said.

Williamson said the Bush administration plans a renewed campaign to convince Congress to open the Arctic National Wildlife Refuge for oil exploration. The oil industry claims the refuge is the site of the nation's last big oil field.