Section 7. Rights and duties.
The rights and duties created under this act:
(1) Shall exist, with respect to a living artist or a deceased artist's heir, legatee or personal representative, until the end of the 50th year following the artist's death.
(2) May not be waived except by a written statement expressly so providing and signed by the artist or under the conditions prescribed in section 8.
(3) Shall not exist with respect to a work of fine art created under contract for advertising or other commercial use, unless the contract so provides.