§ 7327. Special provisions. 1. Every landscape architect shall have a seal, approved by the board, which shall contain the name of the landscape architect and either the words "Registered Landscape Architect" and such other words or figures as the board may deem necessary. All working drawings and specifications prepared by such landscape architect relating to the setting, approaches or environment for structures or other improvements or under the supervision of such landscape architect, shall be stamped with such seal and signed on the original, with the personal signature of such landscape architect when filed with public officials, or with the official seal and personal signature of a landscape architect granted a limited permit under section seventy-three hundred twenty-five of this article when such drawings and specifications are accompanied by a written authorization from the department for the specific project concerned.

2. Engineers, land surveyors, geologists, architects and landscape architects may join in the formation of a joint enterprise, or a partnership or a professional service corporation or a design professional service corporation or may form any desired combination of such professions and may use in the name of such corporation the title of any of the professions which will be practiced. After the name of each member his or her profession shall be indicated.

3. A firm name may be continued by employees having at least fifteen years of continuous service if the retired members and legal representatives of deceased members consent to such continuance.

4. It shall be lawful for a corporation organized and existing under the laws of the state of New York, and which on or before the first day of April nineteen hundred sixty-one was legally incorporated to practice landscape architecture, while conforming to the provisions of this title, and which has been continuously engaged in such practice since such time to continue such practice provided that the chief executive officer of such corporation in the state of New York shall be a landscape architect licensed under this article, and provided further that the supervision of such projects shall be under the personal supervision of such landscape architect and that such plans and designs shall be prepared under the personal direction and supervision of such landscape architect and bear the stamp of his official seal, and such drawings or specifications shall also be signed on the original, with the personal signature of such landscape architect. No such corporation shall be permitted to change its name and continue to practice landscape architecture, except upon the written approval of the department.