Global norm for measuring property

What was the major reason for the need of such norms?

See, currently, the way property assets are measured can vary considerably from country to country. For example, in India, the concept of super areas have been used to include outdoor swimming pools, stairs, common areas such as pavements, whereas in parts of the Middle East floor areas can include the hypothetical maximum number of floors that could be built on the existing foundations. In Australia, measurements have included outdoor parking spaces, even when they are not physically adjoined to the property itself. With the implementation of a global property measurement standard, properties will be consistently measured; creating a more transparent marketplace, greater public trust, stronger investor confidence, and increased market stability.