No obligation of a member or manager of a limited liability company to the limited liability company, or to a member or manager of the limited liability company, arising under the limited liability company agreement or a separate agreement or writing, and no note, instrument or other writing evidencing any such obligation of a member or manager, shall be subject to the defense of usury, and no member or manager shall interpose the defense of usury with respect to any such obligation in any action.
6 Del. C. § 18-505