Most countries are member of the International Civil Aviation Organization (ICAO) and as such have signed the "Chicago Convention 1944" (111 pages, 2 Mb). Aviation rules and regulations in member countries are based on the recommendations of the ICAO.
In Europe all pilots of light aircraft, general aviation and commercial aircraft must comply with these regulations for their licences, ratings, approvals or certificates. The document below contains these regulations.
Acceptable Means of Compliance and Guidance Material to Part-FCL. This document is 1373 pages and over 9.5 MB in size, loading may take a while.
Excerpt from the document:
Acceptable Means of Compliance and Guidance Material to Part-FCL Amended by: ED Decision 2014/022/R of 2 April 2014 ED Decision 2016/008/R of 2 May 2016
To continue reading see the pdf below: