This option is not recommended. On its own, a promoter statement requirement offers few benefits to justify the costs and burden of applying promoter statements to referendum advertising. Unless combined with a registration requirement, information about promoters’ key office holders may not be accessible.
They recommended at minimum that promoters spending above a certain threshold be registered, and recommended spending limits and expense declaration if a tighter approach was desired. The government ignored them, instead choosing a regulatory regime seemingly designed to allow wealthy interests to spend unlimited money in secret in an effort to buy the outcome. Which casts doubt on the entire referendum process and the legitimacy of the result.
I want the flag changed, but that is increasingly being followed by "but not like this". I'm not sure at what stage my disgust at this entire process is going to win over my dislike of a colonial relic, but its getting close.