Table 5.9 – Parking Spaces
Current Guidelines:  
4.1.2  Accessible Sites and Exterior Facilities: New Construction.  An accessible site shall meet the following minimum requirements: . . .

(5)(a)  If parking spaces are provided for self-parking by employees or visitors, or both, then accessible parking spaces complying with 4.6 shall be provided in each such parking area in conformance with the table below.  . . .

(7)  Building Signage: . . . Elements and spaces of accessible facilities which shall be identified by the International Symbol of Accessibility and which shall comply with 4.30.7 are:

(a)  Parking spaces designated as reserved for individuals with disabilities; . . . 
Final Revised Guidelines:  
208.1  General.  Where parking spaces are provided, parking spaces shall be provided in accordance with 208.
Exception:  Parking spaces used exclusively for buses, trucks, other delivery vehicles, law enforcement vehicles, or vehicular impound shall not be required to comply with 208 provided that lots accessed by the public are provided with a passenger loading zone complying with 503.

216.5  Parking.  Parking spaces complying with 502 shall be identified by signs complying with 502.6
Exceptions: 1.  Where a total of four or fewer parking spaces, including accessible parking spaces, are provided on a site, identification of accessible parking spaces shall not be required.
2.  In residential facilities, where parking spaces are assigned to specific residential dwelling units, identification of accessible parking spaces shall not be required.
Model Codes & Standards
IBC 2000:  Section 1106.1 has an equivalent requirement for the number of accessible parking spaces, but no exception.  Section 1109.1 has an equivalent requirement for identification of accessible parking spaces and a similar exception for sites with few parking spaces. 

IBC 2003:  Section 1106.1 has an equivalent requirement for the number of accessible parking spaces and a similar exception.  Section 1109.1 has an equivalent requirement for identification of accessible parking spaces and an equivalent exception for sites with few parking spaces.