Answer:
Some tanning salons require users to be of legal age - 18 and over - or have a parent/guardian permission if the user is underage - younger than 18. The permission is requested upon first use and the parent/guardian is to sign the tanning bed use agreement at that time.
Some tanning salons do not have this requirement, however many will recommend the user to at least be a teenager - 11-13 and over - before laying. Check with your local salons to see what their requests are on this subject. Every tanning salon operates differently in different areas, countries, and states - depending upon policy.
Irrespective of your legal right to use tanning beds, worldwide medical opinion is that they damage skin, thereby increasing the risk of skin cancer and of premature skin aging. That is too heavy a price to pay for the Golden-Glow look born of vanity. In some sections of the U.S.A., dermatologists could fill their entire office schedule treating only patients who have skin damage, pre-cancer, and cancer as a result of exposure to sunlight and UV rays. Medical groups in the U.S.A. have been urging regulation or elimination of tanning beds, but the tanning bed companies have been arguing that tanning is not only harmless but is, in fact, beneficial. Ironically, the same battle went on over cigarettes and smoking.
Every state has different laws. In CA if you are under 18, you need a parent or guarding to sign the client profile UV tanning form. If you are under 14, you are not allowed to use UV tanning beds.