Government regulations do not fix fees charged by real estate agents. The level of fees is by agreement between the real estate agent and principal.
The fee will be dependent upon the quality and quantity of the services that the principal requires and are appropriate to the property for sale.
The aim is to ask for and receive those services that you are most comfortable with, and those which are most likely to find a buyer or tenant for your property in a reasonable period of time, at a reasonable cost, and at the best possible price.