Despite the ending of formal military ties with Taiwan, the Carter administration has provided for continuing limited military cooperation, including joint U.S. Taiwanese exercises and visits to Taiwan by U.S. warships.

These are among the permissible activities spelled out in confidential guidelines issued late last month by President Carter's national security affairs advisor, Zbigniew Brezezinski.

Under Carter's agreement to normalize relations with mainland China, the United States has severed formal diplomatic relations with Taiwan and will terminate the 1954 U.S. defense treaty with the island republic at the end of this year.

However, the administration, in keeping with promises to help protect Taiwan's security, has said it will continue to sell some defensivemilitaryequipment and maintain other military links with the Taipei government. The Brzezinski guidlines describe the nature and scope of these ties.

According to reliable sources, the guideline specify that joint military excercises specify that joint Military exercises with Taiwan can continue but must be reviewed on a case-by-case basis. The sources added that such a review is now under way to determine what kind exercises would bb appropriate.

In addition, the sources had under the provisions of the guidelines, visits by U.S. naval vessels to Taiwan have been resumed on a modest scale. They said the guidelines call for an average of 7 to 13 ship visits during each four-month period.

In order to keep the ship visits relatively unobtrusive and to avoid frictions with Peking, the guidelines specify that the Defense Department should clear its quarterly plans for ship calls with the State Department, avoid visits during politically sensitive periods and encourage military personnel going ashore to wear civilian clothes.

The guidelines prohibit U.S. officers of flag rank from visiting Taiwan without approval by Defense, State and the National Security Council. They also forbid official contact with Taiwanese authorities or participation in official functions.

In other areas, the guidelines direct that the remaining U.S. military personnel of Taiwan be withdrawn by the end of this month and bar the future assignment of active duty personnel there on a permanent basis.

Civilian employes of the Defense Department can be assigned there provided they temporarily leave government service to accept employment with the American Institute in Taiwan, the private organization that has been set up to handle future relations on an unofficial basis.

Training of Taiwanese military personnel is authorized both on and off the island in cases where the training is not available through Taiwan's own resources or other means. Wherever possible, technical training provided by the United States is to be contracted to civilian sources.

Any Taiwanese military personnel coming to the United States for training must be enlisted men or officers of no higher rank than major. They must travel to the United States on private passports, and, after the end of the year, will not be allowed to wear uniforms or be addressed by their military rank while in this country.

Any U.S. training activities on Taiwan must be confined to trouble-shooting or other direct support of defense equipment or systems provided by the United States. None of this training can be provided by active duty personnel of the U.S. armed forces.

The guidelines also specify that transfer of any classified information essential for continuing programs or equipment supply activities must be done between the American Institute and its Taiwanese counterpart organization. The guidelines direct the institute to give high priority to negotiating a contract with the Taiwenese organization to provide the necessary security for transfers of classified material.