otherwise, you will be bound to arbitrate disputes in accordance with the terms of those paragraphs. If you opt out of these arbitration provisions, Thumbtack also will not be bound by them. </p> <p> <em>Changes to This Section</em>: Thumbtack will provide thirty (30) days' notice of any changes affecting the substance of this Arbitration and Class Action Waiver section by posting on the Thumbtack Terms of Use website, sending you a message, or otherwise notifying you when you are logged into your account. Amendments will become effective thirty (30) days after they are posted on the Thumbtack Terms of Use website or sent to you. </p> <p> Changes to this section will otherwise apply prospectively only to claims arising after the 30th day.