If a regulation appurtenant to the Labour Protection Act (ArbeitnehmerInnenschutzgesetz, ASchG) is missing, transitional law applies. This means that old legal provisions are valid until the relevant legislation enters into force (in particular, the General Labour Protection Regulation (Allgemeine Arbeitnehmerschutz-verordnung, AAV)). Once a new Regulation appurtenant to the Labour Protection Act is passed, the (old) transitional legal provisions become ineffective. This means that the General Labour Protection Regulation applies only to areas where transitional legislation (Part Nine of the Labour Protection Act) contains the relevant provisions. However, it will soon become inoperative as with every new regulation parts of the AAV will no longer be effective. The transitional provisions of the Regulation relating to Work Premises (Arbeitsstättenverordnung, AStV) set forth, with some restrictions, the exceptions for operational areas or designs that were already used on certain defined dates.