1. (a) An individual master plumber displaying his or her name on the exterior of a vehicle shall also display his or her master plumber license number:

   1. (1) In legible type at least 3 inches in height; and
   2. (2) On all the parts of the vehicle where the name is displayed.

2. (b) A licensed plumbing business displaying on the exterior of a vehicle the name of the business or the fact that it is a plumbing business shall also display the license number issued by the board:

   1. (1) In legible type at least 3 inches in height; and
   2. (2) On all the parts of the vehicle where the name is displayed.

Source. #9608, eff 12-2-09