A vehicle which is operated by a private patrol officer licensed pursuant to chapter 648 of NRS or his or her employee and which is equipped with flashing amber warning lights pursuant to NRS 484D.185 may display flashing amber warning lights to the front, sides or rear of the vehicle when:

1.  The private patrol officer or his or her employee who operates the vehicle is engaged in the business for which the private patrol officer is licensed; and

2.  The vehicle is:

(a) On private property which the private patrol officer is authorized to protect;

(b) On a public road and stopped adjacent to private property which the private patrol officer is authorized to protect; or

(c) On a public road and moving at a speed slower than the normal flow of traffic.