WASHINGTON, July 26  Bush administration officials said Wednesday that they were still debating important aspects of a draft bill laying out new rules for bringing terror detainees to trial, with some of the sharpest disagreements over provisions that would allow defendants to be excluded from their own trials.

The military’s senior uniformed lawyers, known as judge advocates general, are concerned that those provisions may prompt other governments to put captured American soldiers on trial in absentia, said a senior official involved in the deliberations about the plan.

The debate is also driven in part by concern expressed by the Supreme Court about the exclusion of defendants when it struck down the Bush administration’s original effort to put terror detainees on trial before military commissions.

Though the draft administration bill provides new rules intended to deal with the Supreme Court objections, the draft plans would still allow defendants to be removed when classified evidence was presented.