3.The purpose of the Private Rented Housing (Scotland) Act is to support responsible landlords and address more effectively the problems caused by landlords who act unlawfully, by strengthening the regulation of the private rented sector. This involves changes to the operation of the systems for registration of private landlords and licensing of houses in multiple occupation. The Act also includes provisions intended to deal with problems caused by overcrowding in the private rented sector and to improve the working of the private sector tenancy regime.