Section 172.220 - Definitions(a) As used in this subpart Length (L), Breadth (B), and Molded Depth (D) are as defined in § 45.3 of this chapter.(b) As used in this part new Great Lakes Vessel means a vessel operating solely within the limits of the Great Lakes as defined in this subchapter that:(1) Was contracted for on or after November 17, 1986, or delivered on or after November 17, 1988.(2) Has undergone a major conversion under a contract made on or after November 17, 1986, or completed a major conversion on or after November 17, 1987.CGD 80-159, 51 FR 33059, Sept. 18, 1986