Additional tax imposed with that under section 12-638b when the real property conveyed is classified as open space, maritime heritage, farm or forest land at the time of transfer.

(b) Any land which has been classified by the record owner thereof as farm land pursuant to section 12-107c or as forest land pursuant to section 12-107d shall, if a controlling interest in the entity which possesses an interest in such land is sold within a period of ten years from the time the owner acquired title to such land or from the time he first caused such land to be so classified, whichever is earlier, be subject to a tax applicable to the present true and actual value of such land, which tax shall be in addition to the tax imposed under this chapter. Said conveyance tax shall be at the following rate: (1) Ten per cent of said present true and actual value if sold within the first year of ownership by such record owner; (2) nine per cent if sold within the second year of ownership by such record owner; (3) eight per cent if sold within the third year of ownership by such record owner; (4) seven per cent if sold within the fourth year of ownership by such record owner; (5) six per cent if sold within the fifth year of ownership by such record owner; (6) five per cent if sold within the sixth year of ownership by such record owner; (7) four per cent if sold within the seventh year of ownership by such record owner; (8) three per cent if sold within the eighth year of ownership by such record owner; (9) two per cent if sold within the ninth year of ownership by such record owner; and (10) one per cent if sold within the tenth year of ownership by such record owner. No conveyance tax shall be imposed by the provisions of this chapter following the end of the tenth year of ownership by such record owner.