(1) Vendor needs to provide sustainable advertising policy and revenue strategy technical study service. • Prepare a technical study offering comprehensive guidance for authorities seeking to develop a sustainable advertising and sponsorship policy, and associated revenue strategy. • The service provider should have expertise in advertising and sponsorship, and experience of advising public sector partners (especially transport authorities) on commercial revenue strategies • Provide clear guidance to transport authorities on developing sustainable advertising and sponsorship policies that align with the goal of protecting and expanding commercial revenue • The service provider will draw on background research and a range of stakeholder perspectives to develop a technical study that can be valuable to cities across Africa, Asia, and Latin America. • Provider should conduct desk research and interviews to understand key challenges and opportunities in developing a sustainable advertising and sponsorship policy that can actively advance commercial revenue expansion • Independent experts on advertising and sponsorship revenue for public transport networks.