UNITED STATES OF AMERICA
United States of America has pretty strict laws regarding the usage of drones for commercial shoots. With strict licensing and heavy restrictions imposed by the Federal Aviation Authority (FAA). Commercial restrictions on drones cover a lot but for the important points to remember:
Unmanned aircraft must weigh less than 55 lbs. (25 kg)
Drones have to remain in visual line of sight of the pilot and of observers
Pilots must be at least 16 years old
Operation is only allowed during daylight hours or twilight with appropriate anti collision lighting
Maximum ground speed of 100 mph (87 knots) and maximum altitude of 400 feet above ground level
Minimum weather visibility of 3 miles from control station
Pilots must hold a "remote pilot airman certificate" issued by the FAA
Another problem too is that the laws may vary from state to state as some states have their own rules and regulations with the scope of drone use.
For those flying for recreational use though, the laws are much more relaxed. There’s no need for any pilot license and only has to be registered if your drone weights 0.55 lbs. You are also not allowed to fly drone’s above 55 lbs, which is a stretch for any casual flyer.