Usually, no, although that's something which could vary by state. You would need to contact your state's DMV 1: to see if they even have a chauffeur licence (not all states do) and 2: to see if a DOT medical card is required.
Business of Wedding Cars in London does not require any particular license but the chauffeur license is required to drive a vehicle.
This law varies by state. States which have a chauffeur's license system typically require it for all livery vehicles.
tennessee
There are no "chauffeur's licenses" anymore, not since the Commercial Driver License system was introduced. Some states do still have what they call a chauffeur's licence, intended for vehicles which do not fall under FMSCR (RVs, registered farm vehicles, firefighting apparatus, etc.). These are regulated by the issuing state, and requirements can vary far and wide by state. You need to inquire with your local DMV to find out what the laws are in YOUR state.
If it's a private vehicle, just a regular drivers license. If it's a commercial passenger transporter, then it doesn't require a CDL, and licensing requirements are up to the state. Some states don't require any upgrade, while others might require a chauffeur's license or something similar.
A Class D license is for commercial use vehicles which don't require a CDL, and is equivalent to what some states refer to as a chauffeur's license. It's used for people operating things such as taxis, limosines, shuttle vans, etc. A Class R license is the "standard" drivers license.
Only if you're operating a commercial vehicle with a GVW of more than 10,000 lbs. across state lines or getting a CDL - both require a valid DOT medical card.
Yes, if it is a condition of employment.
AS of July 2014, Pennsylvania does not require a blood test to get married. One state that does require a blood test is Georgia.
To operate the privlidges of a private or commercial license, you must have a valid medical certificate. 2nd class for commercial, 3rd class for private. This requires you to get a medical examination by a AME (aviation medical examiner)
You apply for a marriage license. They will provide the forms and the requirements. If you can meet the requirements, which may require a physical and showing up with the parents, they will issue the license.
Chauffeur insurance can be applied to many different situations. Common users of Chauffeur insurance include Taxi drivers, Minicab hire and limousine hire companies.