Swirl - here you go for the requirements in NYS....
Qualifying Disabilities For Plates or a Parking Permit for People With Severe Disabilities:
A qualifying disability is one or more of the following impairments, disabilities or conditions that are both permanent in nature and affect mobility:
1.Use of portable oxygen;
2.Legal blindness;
3.Limited use, or no use, of one or both legs;
4.Inability to walk 200 feet without stopping;
5.A neuro-muscular dysfunction that severely limits mobility;
6.A Class III or IV cardiac condition (American Heart Association standards);
7.Severe limitation in the ability to walk due to an arthritic, neurological or orthopedic condition;
8.Restriction because of lung disease to such an extent that forced (respiratory) expiratory volume for one second, when measured by spirometry, is less than one liter, or the arterial oxygen tension is less than sixty mm/hg of room air at rest;
9.Any other physical or mental impairment not previously listed which constitutes an equal degree of disability, and imposes unusual hardship in the use of public transportation and prevents the person from getting around without great difficulty.
A Temporary Parking Permit, valid for six months, may be issued when a person has a temporarily disabling condition that makes the person unable to walk without a cane, crutches, a walker or other assisting device.