# Customizable Licensing and Usage Terms The **order book mechanism** allows for **flexible licensing** and usage agreements between model creators and buyers. Sellers can define the terms of use, such as the duration of the rental period, usage restrictions, and price adjustments, while buyers can negotiate the best deal for their needs. Once the terms are agreed upon, smart contracts automatically execute the transaction, ensuring that both parties adhere to the agreed-upon terms and conditions. * **Smart Contracts:** These self-executing contracts ensure that transactions are carried out as intended. Once the conditions of a sale or rental agreement are met, the smart contract automatically triggers the payment and model transfer process, minimizing risk and guaranteeing compliance. * **Flexible Licensing:** Whether it’s a one-time purchase, a subscription model, or a rental agreement, the order book system can accommodate various licensing structures, providing more options for both buyers and sellers. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://low-codeai.gitbook.io/docs/how-it-works/decentralized-ai-model-marketplace/customizable-licensing-and-usage-terms.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.