"The Minister can sack a Waste Advisory Board member if they do something wrong or can't do their job."
The Minister can remove a member of the Waste Advisory Board from their job at any time if they have a good reason. You might wonder what a good reason is - it includes things like doing something wrong, not being able to do their job, not doing their job, or breaking the rules. If the Minister decides to remove a member, they must tell the member in writing and say why they are being removed.
The Minister must also tell the public about the removal in the Gazette, which is like a official newspaper, as soon as they can after telling the member. When the Minister removes a member, they have to follow some steps to make it official.
You can think of the Gazette like a special place where important notices are published, so everyone can see them.