New privately-run mobility services are now ubiquitous in many urban regions. These include ride-hailing (e.g., Uber, Lyft, and Via) as well as on-demand micro-mobility services such as shared electric scooters and bicycles. While these services are private ventures, companies and public entities can partner to deliver services that augment or enhance public transit. The formal basis for these relationships are often codified in a legal contractual agreement. These contracts are essential, allowing cross-sector partnership and goal setting, as well as legal assignment of risks, liabilities, requirements, and payments.