Be it enacted by the Senate and House of Representatives in General Court assembled, and by the authority of the same, as follows:

SECTION 1. Notwithstanding any general or special law to the contrary, the commonwealth hereby cedes concurrent jurisdiction to the United States over the lands, waters, and improvements in the town of Harvard that: (a) are presently owned or hereafter acquired by condemnation or otherwise, leased, occupied or controlled by the United States for the use by the Federal Bureau of Prisons; and (b) comprise any part of the correctional institution presently known and identified as the Federal Medical Center.

SECTION 2. Cession of concurrent jurisdiction pursuant to section 1 shall take effect only upon acceptance of the jurisdiction by the United States pursuant to 40 U.S.C. section 255. Exclusive jurisdiction over all or any portion of the property described in section 1 shall revest in the commonwealth if the property ceases to be used by the United States for correctional purposes.