New York Codes, Rules and Regulations
Title 10 - DEPARTMENT OF HEALTH
Chapter I - State Sanitary Code
Part 10 - Barber Shops And Beauty Parlors
Maintenance and Operation
Section 10.24 - Sanitation of equipment and implements

(a) Hair brushes, combs and all other implements used on a customer shall be kept clean and sanitary at all times and shall undergo thorough cleansing after serving each customer.

(b) After handling a customer affected with an eruption, or whose skin is broken out, or is inflamed, or contains pus, the instruments shall be effectively cleaned, washed with soap or a detergent and water, then rinsed with water having a temperature of at least 170 degrees Fahrenheit or allowed to remain for five minutes in alcohol (70 per cent--80 per cent) or some other equally efficient disinfectant.