As used herein the following words and phrases shall have the meanings indicated:
Every motor vehicle used, designed or redesigned for the transportation of sick or injured persons.
Any person who shall operate an ambulance on the streets of the City of Brownfield, Texas.
Any person, partnership, joint venture, or corporation or association of persons holding a permit from the City of Brownfield to operate an ambulance.
A City of Brownfield ambulance driver's permit.
(1965 Code of Ordinances, Chapter 2 1/2, Section 2 1/2-1)