This is a difficult question to answer because of the large number of countries and the way in which some of these countries number their rules.  And some countries have different rules for different applications, not just frequency. Here are some of the countries that we get asked about most often. Please note that these can change at any time and these links may not get updated.  Please confirm any rules with the agency websites.
Australia - Australia Communications and Media Authority (ACMA) - AS/NZS 4268, LIPD Class License and Fact Sheet
Brazil – Agencia Nacional De Telecomunicacoes (Anatel) – Resolução nº 506, de 1º de julho de 2008
Canada - Industry Canada – RSS-GEN and RSS-210
Europe - European Telecommunications Standards Institute (ETSI) – EN 300 220, EN 300 440
New Zealand - Ministry of Economic Development - General User License for Short Range Device
United States – Federal Communications Commission, CFR47 Part 15
Please contact Linx if you have questions about other countries that are not on this list.