"I'm so old and overweight that my doctor says I have to have a cart".............
"I'm pregnant and so I need a cart"...............
"I have a really bad hangover from getting wasted while waiting in line last night, and so I need a cart"...........
The problem isn't with the poor guy who really needs it. It's the swine who would take advantage of any crack in the rules. It's amazing that this hasn't come up already.
I'm no lawyer, but the guy is making a reasonable request, and is within his rights under the ADA. Generally, no one has legal problems with a golf loving guy who becomes disabled and wants to play the great courses.....just treat him fairly.
Under ADA, a condition must be permanent and life altering. Hangnails, Pregnancy and Hangovers definitly don't count. Overweight may in extreme cases. Hmm, not sure about old in and of itself......However, Forbes did an article a few years back estimating that 43 Million Americans could be classified as disabled under the broadest interpretation of the law. Of course, some do jump on the bandwagon (remember the Simpsons episode where Homer gains 100 lbs. to qualify for working at home under ADA? I'll bet that had some basis in truth) and the DOJ is generally in favor of liberal interpretations, so that no disabled American is denied their rights under this law.
A cart with orange flag should be provided, but all access must be reasonable. Generally, if the course determines that (and it should do so under some kind of a written policy previously established, and not a whim) wet conditions make it either unsafe, or potentially damaging to the greens and tees, etc. access would not be considered reasonalble.
Providing carts only to the legally disabled shouldn't set a huge precedent - I know a few senior PGA Tour guys have used them temporarily, and older ones constantly, but the wholesale jumping on the cart hasn't happened, to my knowledge. In the public sector, I think the walking only would still be enforceable at the Black.
As to who determines, unfortunatly, the individual courses do, and if someone has a complaint, it is settled through an ADA mediator from Dept. of Justice, or litigation. The law was intended to have a flexible interpretation settled in these ways.....aint America great?
BTW, all courses are covered. There are "private clubs" for discriminaton and other compliance reasons - generally under 400 members, no outside income from weddings, etc. and strict guest policies, including no business guests. (Clubs that fit the first two criteria often strictly enforce the no talking about business rule to fit the third) are probably exempt from ADA - for now. Most private clubs don't fit that description, and are considered "places of public accomodation" and are just as subject to ADA as any other public or business facilities.
If you think golf courses have safety and access issues, consider the plight of ski hills, water parks, and roller coasters, who also must comply.