“When the construction of a building is complete, the building owner is responsible for its upkeep and maintenance, particularly its safety features or essential safety measures.
The maintenance of essential safety measures will ensure that the safety systems dealing with predominantly fire situations within the building remain at the required operational level throughout the life of the building. The required maintenance depends on the complexity of the safety measure, equipment or feature and the experience of the person carrying out the inspection or test”

Souce: Victorian Building Authority

http://www.buildingcommission.com.au/__data/assets/pdf_file/0009/7587/Essential-Service-DL-Dec-2011.pdf