(a) Any person who possesses diploid grass carp in violation of section 26-55 and the regulations adopted under said section, and who submits written notice of such possession to the Department of Environmental Protection, not later than January 1, 1990, shall not be subject to the penalty provided in said section 26-55.

      (b) The department shall evaluate each site where diploid grass carp are present.

      (c) The department shall allow diploid grass carp present in Connecticut on June 6, 1989, to remain, provided such carp are in a contained environment. As used in this subsection, “contained environment” means a lake or pond that has no outlet or whose outlet is screened or otherwise controlled to prevent the migration of fish.

      (d) The department shall publicize the statutes and regulations pertaining to the importation, possession and liberation of diploid grass carp into the state.