In November 2012 we published a symposium issue (volume 2, number 4 of IDPL1) containing a series of papers analysing the laws and practices of nine countries (Australia, Canada, China, Germany, India, Israel, Japan, the UK, and the USA) relating to systematic government access to personal data held by the private sector. Those papers, developed as part of a multi-year project funded by The Privacy Projects—a not-for-profit organization dedicated to improving current privacy policies, practices and technologies through research, collaboration, and education2—demonstrated considerable consistency in the laws and practices of the nine countries examined.
Kuner, C., Cate, F. H., Millard, C., & Svantesson, D. J. B. (2014). Systematic government access to private-sector data redux. International Data Privacy Law, 4(1), 1-3. https://doi.org/10.1093/idpl/ipt039