In most countries, the most expensive part of prosecuting a patent application is the cost of search and examination. Singapore took a positive approach by allowing an applicant to rely on search and examination results for a corresponding application in lieu of search and examination of the Singapore application. No official fees are imposed on an applicant who chooses to do so. For this purpose, corresponding applications from Australia, Canada, the EPO, UK, US and PCT (not designating Singapore) may be used. A corresponding application must relate to substantially the same invention and be connected to the Singapore application by a priority claim, for example, a common priority claim.