The international view of the sex trade industry is forever changing and each country has very specific laws and regulations that are enforced by local authorities. Federal, state, and local laws enforce laws and regulate the sex trade industry through different means, amongst them, licensing, area localization and regional registration. If you are planning to travel or are looking for the laws in different countries for advertising or marketing, ProCon.org is a great resource.
The UN has been involved in the elimination of human trafficking throughout the world and has great information on the issues surrounding the sex trade internationally. Information can be found at United Nations Office on Drugs and Crime. Although the sex trade is present in almost all countries around the world the way in which each country deals with the sex trade is unique.
Researching your area of interest will save you an enormous amount of time and frustration once you begin operating. Marketing strategies can be geared in a manner which stay within the boundaries of the local and state laws, as well as operating strategies will be kept within the boundaries set forth by the local authorities.
The home-work you do now will greatly reduce the hassles and stresses of operating in different countries across the world. Keep in mind that you may question the local authority of your chosen location about their rules and regulations if you are unsure of the legalities surrounding the profession in that area.