Table 5.2 – Operable Parts
Current Guidelines:  4.1.3  Accessible Buildings: New Construction.  Accessible buildings and facilities shall meet the following minimum requirements: . . .

(13)  Controls and operating mechanisms in accessible spaces, along accessible routes, or as parts of accessible elements (for example, light switches and dispenser controls) shall comply with 4.27.

4.27.3  Height.  The highest operable part of controls, dispensers, receptacles, and other operable equipment shall be placed within at least one of the reach ranges specified in 4.2.5 and 4.2.6.  Electrical and communications systems receptacles on walls shall be mounted no less than 15 in (380 mm) above the floor.
Exception:  These requirements do not apply where the use of special equipment dictates otherwise or where electrical and communica-tions systems receptacles are not normally intended for use by building occupants.

4.27.4  Operation.  Controls and operating mechanisms shall be operable with one hand and shall not require tight grasping, pinching, or twisting of the wrist.  The force required to activate controls shall be no greater than 5 lbf (22.5N).
Final Revised Guidelines:  205.1  General.  Operable parts on accessible elements, accessible routes, and in accessible rooms and spaces shall comply with 309.
Exceptions: 1.  Operable parts that are intended for use only by service or maintenance personnel shall not be required to comply with 309.
2.  Electrical or communication receptacles serving a dedicated use shall not be required to comply with 309.
3.  Where two or more outlets are provided in a kitchen above a length of counter top that is uninterrupted by a sink or appliance, one outlet shall not be required to comply with 309.
4.  Floor electrical receptacles shall not be required to comply with 309.
5.  HVAC diffusers shall not be required to comply with 309.
6.  Except for light switches, where redundant controls are provided for a single element, one control in each space shall not be required to comply with 309. . . .

309.3  Height.  Operable parts shall be placed within one or more of the reach ranges specified in 308.

309.4  Operation.  Operable parts shall be operable with one hand and shall not require tight grasping, pinching, or twisting of the wrist.  The force required to activate operable parts shall be 5 pounds (22.2 N) maximum. 
Exception:  Gas pump nozzles shall not be required to provide operable parts that have an activating force of 5 pounds (22.2 N) maximum.
Model Codes & Standards
IBC 2000:  Section 1108.13 has an equivalent requirement for operable parts, but no exceptions.  Section 1103.2.12 exempts gas pumps from accessibility requirements.

IBC 2003:  Section 1109.13 has an equivalent requirement for operable parts and equivalent exceptions.  Section 1103.2.14 requires operable parts on gas pumps to comply with the technical requirement for height.