House Government Operations Committee Chairman Jack Brooks (D-Tex.), continued to voice opposition to the government reorganization authority being sought by President Carter said yesterday that a subcommittee he heads will begin hearings on the legislation March 1.

Addressing the Washington Press Club, Brooks promised not to delay action on the bill, which he said still may take "a couple of months" to clear through the House.

But Brooks also repeated his criticism of the Carter proposal, while conceding that it will not be easy to deny a President authority that Carter has described as crucial to the success of his administration.

Carter is seeking essentially the same authority to reorganize the executive branch that has been granted to other President over Brooks' objections. Under it, reorganization plans he submitted to Congress would automatically go into effect unless vetoed within 60 days of their submission by either the House or the Senate.

Brooks said yesterday that such a method is unconstitutional because it would vest in a President the power of enact legislation "without Congress doing anything."

As an alternative Brooks said he will propose at the subsommittee hearings a plan under which reorganization plans submitted by President would become law only if they were approved by both the House and Senate within 60 days of their submission.

Brooks also noted that under his proposal the President could only submit a single reorganization proposal every 30 days, while under the administration's legislation Carter would be free to submit separate reorganization plans affecting numerous agencies at one time.

"If we had two or three plans kicking around, obviously we could not evaluate them in depth," he said. Brooks called this aspect of the Carter proposal "a trading aspects of his legislation that should be knocked out.