California has some of the most advanced and intricate licensing and permitting in the nation. Strong and detailed environmental regulations mean extra licensing for businesses such as mechanics and healthcare organizations. Cities often take care of some of the most local issues like valet parking, while counties manage health permitting, particularly food businesses. California itself oversees many industries, particularly professions and businesses that affect public safety.
In California, a refrigeration contractor constructs, fabricates, erects, installs, maintains, services and repairs refrigerators, refrigerated rooms, and insulated refrigerated spaces, temperature insulation, air-conditioning units, ducts, blowers, registers, humidity and thermostatic controls for the control of air, liquid and/or gas temperatures below fifty degrees Fahrenheit (50º), or ten degrees Celsius (10º).