Sheng nu cites studies that show that women are now breaking the tradition of "mandatory marriage" to have fewer children or marry later on in life. Other typologically similar terms that are still used in the modern lexicon of other countries and cultures show the concept has existed in some cases as far back as the 16th century. The term spinster was used to describe unmarried or single women of a marriageable age. It wasn't until 2004 when the Civil Partnership Act replaced the word spinster with "single" in the relationship history section of marriage certificates in the UK. Subsequently, at the
Renewable Energy Certificates Registry Renewable Energy Certificates Registry The Renewable Energy Certificates Registry (REC-registry) is an internet-based registry system established by the Australian Renewable Energy (Electricity) Act 2000 (the Act), and maintained by the Clean Energy Regulator. The REC-registry: Prior to 1 January 2011, the primary mechanism in the renewable energy target (RET) was the renewable energy certificate (REC). From 1 January 2011 RECs were split into small-scale technology certificates (STCs) and large-scale generation certificates (LGCs). RECs are still used as a general term covering both STCs and LGCs. All certificates must be created in the REC-registry before they can be bought, sold, traded