Also known as bordatella, it is required by FW and suggested by vets if your pet is going to be kenneled.
For those who don't agree with vaccinations, local health laws wherever I have lived have, without exception, required vaccination, not proof of immunity. You will be assuming quite a liability if your pet is involved in a biting incident and you can't provide proof of vaccination. Last year, the staff at the kennels was VERY upset when a pet was checked in after hours by staff at the outpost with no proof of vaccination. The owners could not provide it, and the pet was removed immediately, not only for the safety of other animals but for the safety of the staff. Another anecdote - several years ago a neighbors pet got loose and bit me on the leg. My first question - has it had its shots? After they answered yes, my next statement was - prove it! Fortunately for them, they could. Saved everybody a lot of heartache. History and medical science supports vaccination as an effective means of controlling disease, and the law requires it for your dog.