Chap. 762. An Act providing that certain licenses for the PURPOSE OF PLACING AND MAINTAINING FILL OVER CERTAIN TIDEWATERS. IN THE CITY OF SALEM BE IRREVOCABLE. Be it enacted, etc., as follows: The "licenses granted by the harbor commissioners, being license numbered 156 and dated May 21 and August 27, 1873, and license numbered 189 and dated November 12, 1873, the license granted by. the harbor and land commissioners, being license numbered 3507 and dated September 30, 1910, and the licenses granted by the department of public works, being license numbered 2120 and dated October 4, 1939 and license numbered 2541 and dated October 6, 1942, and any and all other licenses or authorizations granted by the department of public works or by any predecessor to construct and maintain sea walls, bulkheads, dolphins, rip-rap, walk-ways and wharves and to place and maintain fill, piles, pipes and other structures in certain tidewaters in "the city of Salem in the area shown as lots A and B on' a plan drawn by Essex Survey Service, Inc., dated October 5, 1970, and recorded in the southern district registry of deeds in Essex county Plan Book 119, Plan 46, shall, notwithstanding any provision of general or special law to the contrary, be irrevocable; provided, however, that if the commonwealth or any of its political subdivisions shall take, within ten years after .the effective date of this act, any land which has the benefit of said licenses, the damages recoverable by reason of such taking shall not exceed the fair value of such land on the effective date of this act together with the cost of any buildings or improvements thereon, with interest at four percent annually from such effective date or date such cost was incurred as the case may be. Approved July 17,1972.