Publisher: Supporting withdrawal of consent

As a publisher, what is my role in supporting withdrawal of consent?

Vendors must support the withdrawal of consent. Since consent is transmitted from publisher or CMPs to partners and vendors on each request, the publisher or CMP should provide a mechanism for users to withdraw consent. This mechanism may be as simple as collecting consent at each user session, or providing an option that enables the user to withdraw consent later. The UI for withdrawing consent should be the same as the UI by which consent was given.