Madam Speaker, from my meetings with the CRA in the past on implementing this on the tax form, the question would be there every year for the individual to either mark yes, they were willing, or to just leave blank. If a person left it blank, it would stay that way on next year's form. If a person changes their mind in the future, they would need to change it on their income tax form.
In the House of Commons on October 26th, 2020. See this statement in context.