15. Exclusion of young persons(1) A holder of a licence to sell spirits, wine or beer shall not allow a person under the apparent age of eighteen years to be in the bar of the licensed premises during permitted hours.(2) A licensee who contravenes subsection (1), and a person who causes or procures a person under the apparent age of eighteen years to enter or to be in the bar of a licensed premises during the permitted hours, commits an offence and is liable on conviction to a fine not exceeding twenty-five penalty units and in default of payment to a term of imprisonment not exceeding one month.(3) Where a person under the apparent age of eighteen years is found in the bar of a licensed premises during permitted hours, the holder of the licence shall be deemed to have committed an offence under this msection unless the holder shows that due care to prevent that person from being admitted to the bar was used or that the young person had attained the age of eighteen years.(4) A licensee under this Act shall not sell spirits, wine or beer to a drunken person or permit disorderly or improper conduct on the premises or a part of the premises attached to the premises.