The hull identification number is the permanent identification for any vessel titled under the provisions of Natural Resources Article, §8-715, Annotated Code of Maryland. The hull identification number shall be displayed on the vessel pursuant to 33 CFR §181.29 as amended. Carved, burned, stamped, embossed, molded, bonded, or otherwise permanently affixed so that alteration would be obvious; Primary hull identification number affixed to the starboard outboard side of the transom within two inches of the top of the transom, gunwale, or hull/deck joint, whichever is lowest; Duplicate hull identification number affixed in an unexposed location on the interior of the boat or beneath a fitting or item of hardware; and Characters must be no less than one-fourth of an inch high. Persons who build a vessel for their own use and are not engaged in the business of manufacturing boats for resale shall obtain from the Department a hull identification number for any vessel they build. Vessels built before November, 1972 are exempt from the requirements of this regulation.